From 10f04405e637d2ec00c305c3e711b937a1290680 Mon Sep 17 00:00:00 2001
From: LyricLy <gulliverhanson@gmail.com>
Date: Wed, 15 Apr 2020 20:42:17 +1200
Subject: [PATCH 1/2] Add support for passing maximum tape size as a CLI option

---
 Cargo.lock             | 260 +++++++++++++++++++++--------------------
 mandel                 | Bin 0 -> 34816 bytes
 mandel.b               | 145 +++++++++++++++++++++++
 src/bounds.rs          |  44 +++----
 src/execution.rs       |  64 +++++-----
 src/main.rs            |  10 +-
 src/soundness_tests.rs |   6 +-
 7 files changed, 342 insertions(+), 187 deletions(-)
 create mode 100755 mandel
 create mode 100644 mandel.b

diff --git a/Cargo.lock b/Cargo.lock
index d1e6dc31..d51cf762 100644
--- a/Cargo.lock
+++ b/Cargo.lock
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diff --git a/mandel.b b/mandel.b
new file mode 100644
index 00000000..e704ff48
--- /dev/null
+++ b/mandel.b
@@ -0,0 +1,145 @@
+ A mandelbrot set fractal viewer in brainfuck written by Erik Bosman
++++++++++++++[->++>>>+++++>++>+<<<<<<]>>>>>++++++>--->>>>>>>>>>+++++++++++++++[[
+>>>>>>>>>]+[<<<<<<<<<]>>>>>>>>>-]+[>>>>>>>>[-]>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>[-]+
+<<<<<<<+++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>>>+>>>>>>>>>>>>>>>>>>>>>>>>>>
+>+<<<<<<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+[>>>>>>[>>>>>>>[-]>>]<<<<<<<<<[<<<<<<<<<]>>
+>>>>>[-]+<<<<<<++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>>+<<<<<<+++++++[-[->>>
+>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>>+<<<<<<<<<<<<<<<<[<<<<<<<<<]>>>[[-]>>>>>>[>>>>>
+>>[-<<<<<<+>>>>>>]<<<<<<[->>>>>>+<<+<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>
+[>>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<+<<]>>>>>>>>]<<<<<<<<<[<<<<<<<
+<<]>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<<<]>>>>>>>>>+++++++++++++++[[
+>>>>>>>>>]+>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+[
+>+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>[-<<<<+>>>>]<<<<[->>>>+<<<<<[->>[
+-<<+>>]<<[->>+>>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<
+<<[>[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<]>[->>>>>>>>>+<<<<<<<<<]<+>>>>>>>>]<<<<<<<<<
+[>[-]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+<<<<<<<<<]>>>>>
+>>>>[>+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>>[-<<<<<+>>>>>]<<<<<[->>>>>+
+<<<<<<[->>>[-<<<+>>>]<<<[->>>+>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>
+>>>>>>>]<<<<<<<<<[>>[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<<]>>[->>>>>>>>>+<<<<<<<<<]<<
++>>>>>>>>]<<<<<<<<<[>[-]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<
+<]<+<<<<<<<<<]>>>>>>>>>[>>>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>
+>>>>>>>>>>>>>>>>>>>>>>>]>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[[>>>>
+>>>>>]<<<<<<<<<-<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+>>>>>>>>>>>>>>>>>>>>>+<<<[<<<<<<
+<<<]>>>>>>>>>[>>>[-<<<->>>]+<<<[->>>->[-<<<<+>>>>]<<<<[->>>>+<<<<<<<<<<<<<[<<<<<
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+<[->>+>+<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<<<[>[->>>>
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+[-<<<+>[<->-<<<<<<<+>>>>>>>]<[->+<]>>>]<<[->>+<<]<+<<<<<<<<<]>>>>>>>>>[>>>>>>[-<
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+]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+<<<<<<<<<]>>>>>>>>>
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+[>[->>>>>+<<<<[->>>>-<<<<<<<<<<<<<<+>>>>>>>>>>>[->>>+<<<]<]>[->>>-<<<<<<<<<<<<<<
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+<<<<[<<<<<<<<<]>>>>>>>>>-]+[>>>[-<<<->>>]+<<<[->>>->[-<<<<+>>>>]<<<<[->>>>+<<<<<
+<<<<<<<<[<<<<<<<<<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>[-<<<<->>>>]+<<<<[->>>>-<[-
+<<<+>>>]<<<[->>>+<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>
+>>>>>>>]<<<<<<<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-<<<+>>>]<<<[->>>+>>>>>>[>+>>>
+[-<<<->>>]<<<[->>>+<<<]>>>>>>>>]<<<<<<<<+<[>[->+>[-<-<<<<<<<<<<+>>>>>>>>>>>>[-<<
++>>]<]>[-<<-<<<<<<<<<<+>>>>>>>>>>>>]<<<]>>[-<+>>[-<<-<<<<<<<<<<+>>>>>>>>>>>>]<]>
+[-<<+>>]<<<<<<<<<<<<<]]>>>>[-<<<<+>>>>]<<<<[->>>>+>>>>>[>+>>[-<<->>]<<[->>+<<]>>
+>>>>>>]<<<<<<<<+<[>[->+>>[-<<-<<<<<<<<<<+>>>>>>>>>>>[-<+>]>]<[-<-<<<<<<<<<<+>>>>
+>>>>>>>]<<]>>>[-<<+>[-<-<<<<<<<<<<+>>>>>>>>>>>]>]<[-<+>]<<<<<<<<<<<<]>>>>>+<<<<<
+]>>>>>>>>>[>>>[-]>[-]>[-]>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-]>[-]>>>>>[>>>>>>>[-<<<<<
+<+>>>>>>]<<<<<<[->>>>>>+<<<<+<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>+>[-<-<<<<+>>>>
+>]>>[-<<<<<<<[->>>>>+<++<<<<]>>>>>[-<<<<<+>>>>>]<->+>>]<<[->>+<<]<<<<<[->>>>>+<<
+<<<]+>>>>[-<<<<->>>>]+<<<<[->>>>->>>>>[>>>[-<<<->>>]+<<<[->>>-<[-<<+>>]<<[->>+<<
+<<<<<<<<<[<<<<<<<<<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>[-<<->>]+<<[->>->[-<<<+>>>]<
+<<[->>>+<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<
+<<<<<<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-<<<+>>>]<<<[->>>+>>>>>>[>+>[-<->]<[->+
+<]>>>>>>>>]<<<<<<<<+<[>[->>>>+<<[->>-<<<<<<<<<<<<<+>>>>>>>>>>[->>>+<<<]>]<[->>>-
+<<<<<<<<<<<<<+>>>>>>>>>>]<]>>[->>+<<<[->>>-<<<<<<<<<<<<<+>>>>>>>>>>]>]<[->>>+<<<
+]<<<<<<<<<<<]>>>>>[-]>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<<<]]>>>>[-<<<<+>
+>>>]<<<<[->>>>+>>>>>[>+>>[-<<->>]<<[->>+<<]>>>>>>>>]<<<<<<<<+<[>[->>>>+<<<[->>>-
+<<<<<<<<<<<<<+>>>>>>>>>>>[->>+<<]<]>[->>-<<<<<<<<<<<<<+>>>>>>>>>>>]<<]>[->>>+<<[
+->>-<<<<<<<<<<<<<+>>>>>>>>>>>]<]>[->>+<<]<<<<<<<<<<<<]]>>>>[-]<<<<]>>>>[-<<<<+>>
+>>]<<<<[->>>>+>[-]>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<<<]>>>>>>>>>[>>>>>>
+>>>]<<<<<<<<<[>[->>>>+<<<[->>>-<<<<<<<<<<<<<+>>>>>>>>>>>[->>+<<]<]>[->>-<<<<<<<<
+<<<<<+>>>>>>>>>>>]<<]>[->>>+<<[->>-<<<<<<<<<<<<<+>>>>>>>>>>>]<]>[->>+<<]<<<<<<<<
+<<<<]]>>>>>>>>>[>>[-]>[-]>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-]>[-]>>>>>[>>>>>[-<<<<+
+>>>>]<<<<[->>>>+<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>>>>[-<<<<<+>>>>>
+]<<<<<[->>>>>+<<<+<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[[>>>>
+>>>>>]+>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+[>+>>
+>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>[-<<<<+>>>>]<<<<[->>>>+<<<<<[->>[-<<+
+>>]<<[->>+>>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<<<[>
+[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<]>[->>>>>>>>>+<<<<<<<<<]<+>>>>>>>>]<<<<<<<<<[>[-
+]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+<<<<<<<<<]>>>>>>>>>
+[>+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>>[-<<<<<+>>>>>]<<<<<[->>>>>+<<<<
+<<[->>>[-<<<+>>>]<<<[->>>+>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>
+>>>]<<<<<<<<<[>>[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<<]>>[->>>>>>>>>+<<<<<<<<<]<<+>>>
+>>>>>]<<<<<<<<<[>[-]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+
+<<<<<<<<<]>>>>>>>>>[>>>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>
+>>>>>>>>>>>>>>>>>>>]>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[[>>>>>>>>
+>]<<<<<<<<<-<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+>>>>>>>>>>>>>>>>>>>>>+<<<[<<<<<<<<<]
+>>>>>>>>>[>>>[-<<<->>>]+<<<[->>>->[-<<<<+>>>>]<<<<[->>>>+<<<<<<<<<<<<<[<<<<<<<<<
+]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>[-<<<<->>>>]+<<<<[->>>>-<[-<<<+>>>]<<<[->>>+<
+<<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<<<]>
+>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>->>[-<<<<+>>>>]<<<<[->>>>+<<[-]<<]>>]<<+>>>>[-<<<<
+->>>>]+<<<<[->>>>-<<<<<<.>>]>>>>[-<<<<<<<.>>>>>>>]<<<[-]>[-]>[-]>[-]>[-]>[-]>>>[
+>[-]>[-]>[-]>[-]>[-]>[-]>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>>>[-]>>>>]<<<<<<<<<
+[<<<<<<<<<]>+++++++++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>+>>>>>>>>>+<<<<<<<<
+<<<<<<[<<<<<<<<<]>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+[-]>>[>>>>>>>>>]<<<<<
+<<<<[>>>>>>>[-<<<<<<+>>>>>>]<<<<<<[->>>>>>+<<<<<<<[<<<<<<<<<]>>>>>>>[-]+>>>]<<<<
+<<<<<<]]>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+>>[>+>>>>[-<<<<->>>>]<<<<[->>>
+>+<<<<]>>>>>>>>]<<+<<<<<<<[>>>>>[->>+<<]<<<<<<<<<<<<<<]>>>>>>>>>[>>>>>>>>>]<<<<<
+<<<<[>[-]<->>>>>>>[-<<<<<<<+>[<->-<<<+>>>]<[->+<]>>>>>>>]<<<<<<[->>>>>>+<<<<<<]<
++<<<<<<<<<]>>>>>>>-<<<<[-]+<<<]+>>>>>>>[-<<<<<<<->>>>>>>]+<<<<<<<[->>>>>>>->>[>>
+>>>[->>+<<]>>>>]<<<<<<<<<[>[-]<->>>>>>>[-<<<<<<<+>[<->-<<<+>>>]<[->+<]>>>>>>>]<<
+<<<<[->>>>>>+<<<<<<]<+<<<<<<<<<]>+++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>+<<<
+<<[<<<<<<<<<]>>>>>>>>>[>>>>>[-<<<<<->>>>>]+<<<<<[->>>>>->>[-<<<<<<<+>>>>>>>]<<<<
+<<<[->>>>>>>+<<<<<<<<<<<<<<<<[<<<<<<<<<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>>>>[-<
+<<<<<<->>>>>>>]+<<<<<<<[->>>>>>>-<<[-<<<<<+>>>>>]<<<<<[->>>>>+<<<<<<<<<<<<<<[<<<
+<<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<<<]>>>>>>>>]<<<<<<<
+<<[<<<<<<<<<]>>>>[-]<<<+++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>-<<<<<[<<<<<<<
+<<]]>>>]<<<<.>>>>>>>>>>[>>>>>>[-]>>>]<<<<<<<<<[<<<<<<<<<]>++++++++++[-[->>>>>>>>
+>+<<<<<<<<<]>>>>>>>>>]>>>>>+>>>>>>>>>+<<<<<<<<<<<<<<<[<<<<<<<<<]>>>>>>>>[-<<<<<<
+<<+>>>>>>>>]<<<<<<<<[->>>>>>>>+[-]>[>>>>>>>>>]<<<<<<<<<[>>>>>>>>[-<<<<<<<+>>>>>>
+>]<<<<<<<[->>>>>>>+<<<<<<<<[<<<<<<<<<]>>>>>>>>[-]+>>]<<<<<<<<<<]]>>>>>>>>[-<<<<<
+<<<+>>>>>>>>]<<<<<<<<[->>>>>>>>+>[>+>>>>>[-<<<<<->>>>>]<<<<<[->>>>>+<<<<<]>>>>>>
+>>]<+<<<<<<<<[>>>>>>[->>+<<]<<<<<<<<<<<<<<<]>>>>>>>>>[>>>>>>>>>]<<<<<<<<<[>[-]<-
+>>>>>>>>[-<<<<<<<<+>[<->-<<+>>]<[->+<]>>>>>>>>]<<<<<<<[->>>>>>>+<<<<<<<]<+<<<<<<
+<<<]>>>>>>>>-<<<<<[-]+<<<]+>>>>>>>>[-<<<<<<<<->>>>>>>>]+<<<<<<<<[->>>>>>>>->[>>>
+>>>[->>+<<]>>>]<<<<<<<<<[>[-]<->>>>>>>>[-<<<<<<<<+>[<->-<<+>>]<[->+<]>>>>>>>>]<<
+<<<<<[->>>>>>>+<<<<<<<]<+<<<<<<<<<]>+++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>
++>>>>>>>>>>>>>>>>>>>>>>>>>>>+<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>>>>[-<<<<<<->>>>>>]+<
+<<<<<[->>>>>>->>[-<<<<<<<<+>>>>>>>>]<<<<<<<<[->>>>>>>>+<<<<<<<<<<<<<<<<<[<<<<<<<
+<<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>>>>>[-<<<<<<<<->>>>>>>>]+<<<<<<<<[->>>>>>>>
+-<<[-<<<<<<+>>>>>>]<<<<<<[->>>>>>+<<<<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>
+>>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>[-]<<<++++
++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>->>>>>>>>>>>>>>>>>>>>>>>>>>>-<<<<<<[<<<<
+<<<<<]]>>>]
diff --git a/src/bounds.rs b/src/bounds.rs
index 9162bb92..342916e6 100644
--- a/src/bounds.rs
+++ b/src/bounds.rs
@@ -20,24 +20,24 @@ use bfir::AstNode::*;
 #[cfg(test)]
 use bfir::{parse, Position};
 
-// 100,000 cells, zero-indexed.
+// 100,000 cells, zero-indexed. Used only for tests.
 pub const MAX_CELL_INDEX: usize = 99999;
 
 /// Return the highest cell index that can be reached during program
 /// execution. Zero-indexed.
-pub fn highest_cell_index(instrs: &[AstNode]) -> usize {
+pub fn highest_cell_index(instrs: &[AstNode], max_cell_index: usize) -> usize {
     let (highest_index, _) = overall_movement(instrs);
 
     match highest_index {
         SaturatingInt::Number(x) => {
-            if x > MAX_CELL_INDEX as i64 {
+            if x > max_cell_index as i64 {
                 // TODO: generate a warning here.
-                MAX_CELL_INDEX
+                max_cell_index
             } else {
                 x as usize
             }
         }
-        SaturatingInt::Max => MAX_CELL_INDEX,
+        SaturatingInt::Max => max_cell_index,
     }
 }
 
@@ -157,22 +157,22 @@ fn movement(instr: &AstNode) -> (SaturatingInt, SaturatingInt) {
 #[test]
 fn one_cell_bounds() {
     let instrs = parse("+-.,").unwrap();
-    assert_eq!(highest_cell_index(&instrs), 0);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 0);
 }
 
 #[test]
 fn ptr_increment_bounds() {
     let instrs = parse(">").unwrap();
-    assert_eq!(highest_cell_index(&instrs), 1);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 1);
 }
 
 #[test]
 fn ptr_increment_sequence_bounds() {
     let instrs = parse(">>.<").unwrap();
-    assert_eq!(highest_cell_index(&instrs), 2);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 2);
 
     let instrs = parse(">><>>").unwrap();
-    assert_eq!(highest_cell_index(&instrs), 3);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 3);
 }
 
 #[test]
@@ -181,7 +181,7 @@ fn multiple_ptr_increment_bounds() {
         amount: 2,
         position: Some(Position { start: 0, end: 0 }),
     }];
-    assert_eq!(highest_cell_index(&instrs), 2);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 2);
 }
 
 #[test]
@@ -203,7 +203,7 @@ fn multiply_move_bounds() {
         },
     ];
 
-    assert_eq!(highest_cell_index(&instrs), 4);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 4);
 }
 
 /// Multiply move uses offsets to the current pointer value.
@@ -225,7 +225,7 @@ fn multiply_move_bounds_are_relative() {
         },
     ];
 
-    assert_eq!(highest_cell_index(&instrs), 3);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 3);
 }
 
 #[test]
@@ -243,16 +243,16 @@ fn multiply_move_backwards_bounds() {
         },
     ];
 
-    assert_eq!(highest_cell_index(&instrs), 1);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 1);
 }
 
 #[test]
 fn unbounded_movement() {
     let instrs = parse("[>]").unwrap();
-    assert_eq!(highest_cell_index(&instrs), MAX_CELL_INDEX);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), MAX_CELL_INDEX);
 
     let instrs = parse(">[<]").unwrap();
-    assert_eq!(highest_cell_index(&instrs), 1);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 1);
 }
 
 #[test]
@@ -262,28 +262,28 @@ fn excessive_bounds_truncated() {
         amount: MAX_CELL_INDEX as isize + 1,
         position: Some(Position { start: 0, end: 0 }),
     }];
-    assert_eq!(highest_cell_index(&instrs), MAX_CELL_INDEX);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), MAX_CELL_INDEX);
 }
 
 #[test]
 fn loop_with_no_net_movement() {
     // Max cell index 1, final cell position 0.
     let instrs = parse("[->+<]").unwrap();
-    assert_eq!(highest_cell_index(&instrs), 1);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 1);
 
     // Max cell index 1, final cell position 1.
     let instrs = parse("[->+<]>").unwrap();
-    assert_eq!(highest_cell_index(&instrs), 1);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 1);
 
     // Max cell index 2, final cell position 2.
     let instrs = parse("[->+<]>>").unwrap();
-    assert_eq!(highest_cell_index(&instrs), 2);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 2);
 }
 
 #[test]
 fn quickcheck_highest_cell_index_in_bounds() {
     fn highest_cell_index_in_bounds(instrs: Vec<AstNode>) -> bool {
-        let index = highest_cell_index(&instrs);
+        let index = highest_cell_index(&instrs, MAX_CELL_INDEX);
         index <= MAX_CELL_INDEX
     }
     quickcheck(highest_cell_index_in_bounds as fn(Vec<AstNode>) -> bool);
@@ -296,7 +296,7 @@ fn increment_offset_bounds() {
         offset: 5,
         position: Some(Position { start: 0, end: 0 }),
     }];
-    assert_eq!(highest_cell_index(&instrs), 5);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 5);
 }
 
 #[test]
@@ -313,5 +313,5 @@ fn set_offset_bounds() {
             position: Some(Position { start: 0, end: 0 }),
         },
     ];
-    assert_eq!(highest_cell_index(&instrs), 11);
+    assert_eq!(highest_cell_index(&instrs, MAX_CELL_INDEX), 11);
 }
diff --git a/src/execution.rs b/src/execution.rs
index 69c6233b..78136c83 100644
--- a/src/execution.rs
+++ b/src/execution.rs
@@ -34,10 +34,10 @@ pub struct ExecutionState<'a> {
 }
 
 impl<'a> ExecutionState<'a> {
-    pub fn initial(instrs: &[AstNode]) -> Self {
+    pub fn initial(instrs: &[AstNode], max_cell_index: usize) -> Self {
         ExecutionState {
             start_instr: None,
-            cells: vec![Wrapping(0); highest_cell_index(instrs) + 1],
+            cells: vec![Wrapping(0); highest_cell_index(instrs, max_cell_index) + 1],
             cell_ptr: 0,
             outputs: vec![],
         }
@@ -72,8 +72,8 @@ pub fn max_steps() -> u64 {
 /// Compile time speculative execution of instructions. We return the
 /// final state of the cells, any print side effects, and the point in
 /// the code we reached.
-pub fn execute(instrs: &[AstNode], steps: u64) -> (ExecutionState, Option<Warning>) {
-    let mut state = ExecutionState::initial(instrs);
+pub fn execute(instrs: &[AstNode], steps: u64, max_cell_index: usize) -> (ExecutionState, Option<Warning>) {
+    let mut state = ExecutionState::initial(instrs, max_cell_index);
     let outcome = execute_with_state(instrs, &mut state, steps, None);
 
     // Sanity check: if we have a start instruction we
@@ -273,7 +273,7 @@ pub fn execute_with_state<'a>(
 #[test]
 fn cant_evaluate_inputs() {
     let instrs = parse(",.").unwrap();
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -289,7 +289,7 @@ fn cant_evaluate_inputs() {
 #[test]
 fn increment_executed() {
     let instrs = parse("+").unwrap();
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -334,7 +334,7 @@ fn multiply_move_executed() {
         },
     ];
 
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
     assert_eq!(
         final_state,
         ExecutionState {
@@ -359,7 +359,7 @@ fn multiply_move_when_current_cell_is_zero() {
         position: None,
     }];
 
-    let (final_state, warning) = execute(&instrs, max_steps());
+    let (final_state, warning) = execute(&instrs, max_steps(), MAX_CELL_INDEX);
     assert_eq!(warning, None);
     assert_eq!(
         final_state,
@@ -388,7 +388,7 @@ fn multiply_move_wrapping() {
         },
     ];
 
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
     assert_eq!(
         final_state,
         ExecutionState {
@@ -417,8 +417,8 @@ fn multiply_move_offset_too_high() {
         },
     ];
 
-    let final_state = execute(&instrs, max_steps()).0;
-    let mut expected_cells = vec![Wrapping(0); MAX_CELL_INDEX + 1];
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
+    let mut expected_cells = vec![Wrapping(0); MAX_CELL_INDEX];
     expected_cells[0] = Wrapping(1);
     assert_eq!(
         final_state,
@@ -447,7 +447,7 @@ fn multiply_move_offset_too_low() {
         },
     ];
 
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
     assert_eq!(
         final_state,
         ExecutionState {
@@ -466,7 +466,7 @@ fn set_executed() {
         offset: 0,
         position: Some(Position { start: 0, end: 0 }),
     }];
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -486,7 +486,7 @@ fn set_wraps() {
         offset: 0,
         position: Some(Position { start: 0, end: 0 }),
     }];
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -502,7 +502,7 @@ fn set_wraps() {
 #[test]
 fn decrement_executed() {
     let instrs = parse("-").unwrap();
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -529,7 +529,7 @@ fn increment_wraps() {
             position: Some(Position { start: 0, end: 0 }),
         },
     ];
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -545,7 +545,7 @@ fn increment_wraps() {
 #[test]
 fn ptr_increment_executed() {
     let instrs = parse(">").unwrap();
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -561,7 +561,7 @@ fn ptr_increment_executed() {
 #[test]
 fn ptr_out_of_range() {
     let instrs = parse("<").unwrap();
-    let (final_state, warning) = execute(&instrs, max_steps());
+    let (final_state, warning) = execute(&instrs, max_steps(), MAX_CELL_INDEX);
 
     assert_eq!(
         final_state,
@@ -579,7 +579,7 @@ fn ptr_out_of_range() {
 #[test]
 fn limit_to_steps_specified() {
     let instrs = parse("++++").unwrap();
-    let final_state = execute(&instrs, 2).0;
+    let final_state = execute(&instrs, 2, MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -595,7 +595,7 @@ fn limit_to_steps_specified() {
 #[test]
 fn write_executed() {
     let instrs = parse("+.").unwrap();
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -611,7 +611,7 @@ fn write_executed() {
 #[test]
 fn loop_executed() {
     let instrs = parse("++[-]").unwrap();
-    let final_state = execute(&instrs, max_steps()).0;
+    let final_state = execute(&instrs, max_steps(), MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -629,7 +629,7 @@ fn loop_executed() {
 #[test]
 fn partially_execute_up_to_runtime_value() {
     let instrs = parse("+[[,]]").unwrap();
-    let final_state = execute(&instrs, 10).0;
+    let final_state = execute(&instrs, 10, MAX_CELL_INDEX).0;
 
     // Get the inner read instruction
     let start_instr = match instrs[1] {
@@ -663,7 +663,7 @@ fn partially_execute_up_to_runtime_value() {
 fn execute_read_with_dummy_value() {
     let instrs = parse(",").unwrap();
 
-    let mut state = ExecutionState::initial(&instrs[..]);
+    let mut state = ExecutionState::initial(&instrs[..], MAX_CELL_INDEX);
     execute_with_state(&instrs[..], &mut state, 5, Some(1));
 
     assert_eq!(state.cells[0], Wrapping(1));
@@ -674,7 +674,7 @@ fn execute_read_with_dummy_value_nested_loop() {
     // Regression test.
     let instrs = parse("+[[,]]").unwrap();
 
-    let mut state = ExecutionState::initial(&instrs[..]);
+    let mut state = ExecutionState::initial(&instrs[..], MAX_CELL_INDEX);
     let outcome = execute_with_state(&instrs[..], &mut state, 20, Some(0));
 
     assert!(matches!(outcome, Outcome::Completed(_)));
@@ -685,7 +685,7 @@ fn execute_read_with_dummy_value_nested_loop() {
 #[test]
 fn partially_execute_complete_toplevel_loop() {
     let instrs = parse("+[-],").unwrap();
-    let final_state = execute(&instrs, 10).0;
+    let final_state = execute(&instrs, 10, MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -701,7 +701,7 @@ fn partially_execute_complete_toplevel_loop() {
 #[test]
 fn partially_execute_up_to_step_limit() {
     let instrs = parse("+[++++]").unwrap();
-    let final_state = execute(&instrs, 3).0;
+    let final_state = execute(&instrs, 3, MAX_CELL_INDEX).0;
 
     let start_instr = match instrs[1] {
         Loop { ref body, .. } => &body[2],
@@ -724,7 +724,7 @@ fn loop_up_to_step_limit() {
     let instrs = parse("++[-]").unwrap();
     // Assuming we take one step to enter the loop, we will execute
     // the loop body once.
-    let final_state = execute(&instrs, 4).0;
+    let final_state = execute(&instrs, 4, MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -742,7 +742,7 @@ fn loop_with_read_body() {
     // We can't execute the whole loop, so our start instruction
     // should be the read.
     let instrs = parse("+[+,]").unwrap();
-    let final_state = execute(&instrs, 4).0;
+    let final_state = execute(&instrs, 4, MAX_CELL_INDEX).0;
 
     // Get the inner read instruction
     let start_instr = match instrs[1] {
@@ -770,7 +770,7 @@ fn loop_with_read_body() {
 #[test]
 fn up_to_infinite_loop_executed() {
     let instrs = parse("++[]").unwrap();
-    let final_state = execute(&instrs, 20).0;
+    let final_state = execute(&instrs, 20, MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -786,7 +786,7 @@ fn up_to_infinite_loop_executed() {
 #[test]
 fn up_to_nonempty_infinite_loop() {
     let instrs = parse("+[+]").unwrap();
-    let final_state = execute(&instrs, 20).0;
+    let final_state = execute(&instrs, 20, MAX_CELL_INDEX).0;
 
     assert_eq!(
         final_state,
@@ -802,7 +802,7 @@ fn up_to_nonempty_infinite_loop() {
 #[test]
 fn quickcheck_cell_ptr_in_bounds() {
     fn cell_ptr_in_bounds(instrs: Vec<AstNode>) -> bool {
-        let state = execute(&instrs, 100).0;
+        let state = execute(&instrs, 100, MAX_CELL_INDEX).0;
         (state.cell_ptr >= 0) && (state.cell_ptr < state.cells.len() as isize)
     }
     quickcheck(cell_ptr_in_bounds as fn(Vec<AstNode>) -> bool);
@@ -814,5 +814,5 @@ fn arithmetic_error_nested_loops() {
     // mandlebrot.bf. Previously, if the first element in a loop was
     // another loop, we had arithmetic overflow.
     let instrs = parse("+[[>>>>>>>>>]+>>>>>>>>>-]").unwrap();
-    execute(&instrs, max_steps());
+    execute(&instrs, max_steps(), MAX_CELL_INDEX);
 }
diff --git a/src/main.rs b/src/main.rs
index 309c1331..c36ea68e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -168,10 +168,15 @@ fn compile_file(matches: &Matches) -> Result<(), String> {
         return Ok(());
     }
 
+    let max_cell_index: usize = match matches.opt_get("max-cells") {
+        Ok(max) => max.unwrap_or_else(|| 999999),
+        Err(parse_error) => return Err(parse_error.to_string())
+    };
+
     let (state, execution_warning) = if opt_level == "2" {
-        execution::execute(&instrs, execution::max_steps())
+        execution::execute(&instrs, execution::max_steps(), max_cell_index)
     } else {
-        let mut init_state = execution::ExecutionState::initial(&instrs[..]);
+        let mut init_state = execution::ExecutionState::initial(&instrs[..], max_cell_index);
         // TODO: this will crash on the empty program.
         init_state.start_instr = Some(&instrs[0]);
         (init_state, None)
@@ -264,6 +269,7 @@ fn main() {
     opts.optflag("", "dump-llvm", "print LLVM IR generated");
     opts.optflag("", "dump-ir", "print BF IR generated");
 
+    opts.optopt("m", "max-cells", "maximum 0-indexed cell index", "COUNT");
     opts.optopt("O", "opt", "optimization level (0 to 2)", "LEVEL");
     opts.optopt("", "llvm-opt", "LLVM optimization level (0 to 3)", "LEVEL");
     opts.optopt(
diff --git a/src/soundness_tests.rs b/src/soundness_tests.rs
index 9b73298c..897916a1 100644
--- a/src/soundness_tests.rs
+++ b/src/soundness_tests.rs
@@ -5,6 +5,8 @@ use execution::Outcome::*;
 use execution::{execute_with_state, ExecutionState};
 use peephole::*;
 
+use bounds::MAX_CELL_INDEX;
+
 fn transform_is_sound<F>(
     instrs: Vec<AstNode>,
     transform: F,
@@ -17,7 +19,7 @@ where
     let max_steps = 1000;
 
     // First, we execute the program given.
-    let mut state = ExecutionState::initial(&instrs[..]);
+    let mut state = ExecutionState::initial(&instrs[..], MAX_CELL_INDEX);
     let result = execute_with_state(&instrs[..], &mut state, max_steps, dummy_read_value);
 
     // Optimisations may change malformed programs to well-formed
@@ -33,7 +35,7 @@ where
     // get the same number of cells. Otherwise we could get in messy
     // situations where a dead loop that makes us think we use
     // MAX_CELLS so state2 has fewer cells.
-    let mut state2 = ExecutionState::initial(&instrs[..]);
+    let mut state2 = ExecutionState::initial(&instrs[..], MAX_CELL_INDEX);
     let result2 = execute_with_state(
         &optimised_instrs[..],
         &mut state2,

From 9113669f4ca3cfa48e43b7af80855c2653f5fc1b Mon Sep 17 00:00:00 2001
From: LyricLy <gulliverhanson@gmail.com>
Date: Wed, 15 Apr 2020 20:44:23 +1200
Subject: [PATCH 2/2] Whoops

---
 mandel   | Bin 34816 -> 0 bytes
 mandel.b | 145 -------------------------------------------------------
 2 files changed, 145 deletions(-)
 delete mode 100755 mandel
 delete mode 100644 mandel.b

diff --git a/mandel b/mandel
deleted file mode 100755
index bf1f78988a733c9ad624f2d96071133d807d45c2..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/mandel.b b/mandel.b
deleted file mode 100644
index e704ff48..00000000
--- a/mandel.b
+++ /dev/null
@@ -1,145 +0,0 @@
- A mandelbrot set fractal viewer in brainfuck written by Erik Bosman
-+++++++++++++[->++>>>+++++>++>+<<<<<<]>>>>>++++++>--->>>>>>>>>>+++++++++++++++[[
->>>>>>>>>]+[<<<<<<<<<]>>>>>>>>>-]+[>>>>>>>>[-]>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>[-]+
-<<<<<<<+++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>>>+>>>>>>>>>>>>>>>>>>>>>>>>>>
->+<<<<<<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+[>>>>>>[>>>>>>>[-]>>]<<<<<<<<<[<<<<<<<<<]>>
->>>>>[-]+<<<<<<++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>>+<<<<<<+++++++[-[->>>
->>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>>+<<<<<<<<<<<<<<<<[<<<<<<<<<]>>>[[-]>>>>>>[>>>>>
->>[-<<<<<<+>>>>>>]<<<<<<[->>>>>>+<<+<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>
-[>>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<+<<]>>>>>>>>]<<<<<<<<<[<<<<<<<
-<<]>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<<<]>>>>>>>>>+++++++++++++++[[
->>>>>>>>>]+>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+[
->+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>[-<<<<+>>>>]<<<<[->>>>+<<<<<[->>[
--<<+>>]<<[->>+>>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<
-<<[>[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<]>[->>>>>>>>>+<<<<<<<<<]<+>>>>>>>>]<<<<<<<<<
-[>[-]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+<<<<<<<<<]>>>>>
->>>>[>+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>>[-<<<<<+>>>>>]<<<<<[->>>>>+
-<<<<<<[->>>[-<<<+>>>]<<<[->>>+>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>
->>>>>>>]<<<<<<<<<[>>[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<<]>>[->>>>>>>>>+<<<<<<<<<]<<
-+>>>>>>>>]<<<<<<<<<[>[-]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<
-<]<+<<<<<<<<<]>>>>>>>>>[>>>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>
->>>>>>>>>>>>>>>>>>>>>>>]>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[[>>>>
->>>>>]<<<<<<<<<-<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+>>>>>>>>>>>>>>>>>>>>>+<<<[<<<<<<
-<<<]>>>>>>>>>[>>>[-<<<->>>]+<<<[->>>->[-<<<<+>>>>]<<<<[->>>>+<<<<<<<<<<<<<[<<<<<
-<<<<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>[-<<<<->>>>]+<<<<[->>>>-<[-<<<+>>>]<<<[->
->>+<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<
-<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]<<<<<<<[->+>>>-<<<<]>>>>>>>>>+++++++++++++++++++
-+++++++>>[-<<<<+>>>>]<<<<[->>>>+<<[-]<<]>>[<<<<<<<+<[-<+>>>>+<<[-]]>[-<<[->+>>>-
-<<<<]>>>]>>>>>>>>>>>>>[>>[-]>[-]>[-]>>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-]>>>>>>[>>>>>
-[-<<<<+>>>>]<<<<[->>>>+<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>[-<<<<<<<<
-<+>>>>>>>>>]>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[[>>>>>>>>>]+>[-
-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+[>+>>>>>>>>]<<<
-<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>>[-<<<<<+>>>>>]<<<<<[->>>>>+<<<<<<[->>[-<<+>>]<
-<[->>+>+<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<<<[>[->>>>
->>>>>+<<<<<<<<<]<<<<<<<<<<]>[->>>>>>>>>+<<<<<<<<<]<+>>>>>>>>]<<<<<<<<<[>[-]<->>>
-[-<<<+>[<->-<<<<<<<+>>>>>>>]<[->+<]>>>]<<[->>+<<]<+<<<<<<<<<]>>>>>>>>>[>>>>>>[-<
-<<<<+>>>>>]<<<<<[->>>>>+<<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>+>>>>>>>>
-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>>[-<<<<<+>>>>>]<<<<<[->>>>>+<<<<<<[->>[-<<+
->>]<<[->>+>>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<<<[>
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-]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+<<<<<<<<<]>>>>>>>>>
-[>>>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
-]>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>
->>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>]>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>++++++++
-+++++++[[>>>>>>>>>]<<<<<<<<<-<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+[>>>>>>>>[-<<<<<<<+
->>>>>>>]<<<<<<<[->>>>>>>+<<<<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>>>>[
--]>>>]<<<<<<<<<[<<<<<<<<<]>>>>+>[-<-<<<<+>>>>>]>[-<<<<<<[->>>>>+<++<<<<]>>>>>[-<
-<<<<+>>>>>]<->+>]<[->+<]<<<<<[->>>>>+<<<<<]>>>>>>[-]<<<<<<+>>>>[-<<<<->>>>]+<<<<
-[->>>>->>>>>[>>[-<<->>]+<<[->>->[-<<<+>>>]<<<[->>>+<<<<<<<<<<<<[<<<<<<<<<]>>>[-]
-+>>>>>>[>>>>>>>>>]>+<]]+>>>[-<<<->>>]+<<<[->>>-<[-<<+>>]<<[->>+<<<<<<<<<<<[<<<<<
-<<<<]>>>>[-]+>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<<<]>>>>>>>>]<<<<<<<<<
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-<<<+<[>[->>>>>+<<<<[->>>>-<<<<<<<<<<<<<<+>>>>>>>>>>>[->>>+<<<]<]>[->>>-<<<<<<<<<
-<<<<<+>>>>>>>>>>>]<<]>[->>>>+<<<[->>>-<<<<<<<<<<<<<<+>>>>>>>>>>>]<]>[->>>+<<<]<<
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-]<<<<<<<<<<<]>>>>>>+<<<<<<]]>>>>[-<<<<+>>>>]<<<<[->>>>+>>>>>[>>>>>>>>>]<<<<<<<<<
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-+>>>>>>>>>>>]<<]>[->>>>+<<<[->>>-<<<<<<<<<<<<<<+>>>>>>>>>>>]<]>[->>>+<<<]<<<<<<<
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-<<<+>>>>]<<<<[->>>>+<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[
-[>>>>>>>>>]+>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+
-[>+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>[-<<<<+>>>>]<<<<[->>>>+<<<<<[->>
-[-<<+>>]<<[->>+>+<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<<
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->[-]<->>>[-<<<+>[<->-<<<<<<<+>>>>>>>]<[->+<]>>>]<<[->>+<<]<+<<<<<<<<<]>>>>>>>>>[
->>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>]>
->>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>[-]>>>>+++++++++++++++[[>>>>>>>>>]<<<<<<<<<-<<<<<
-<<<<[<<<<<<<<<]>>>>>>>>>-]+[>>>[-<<<->>>]+<<<[->>>->[-<<<<+>>>>]<<<<[->>>>+<<<<<
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