[BOJ] 도키도키 간식드리미 / 실버3 / 28분

Author: JYP0824

JYP/도키도키 간식드리미.py

@@ -0,0 +1,15 @@
+a = int(input())
+sts = list(map(int, input().split())) 
+stack = []
+target = 1
+
+for st in sts:
+    stack.append(st)
+    while stack and stack[-1] == target:
+        stack.pop()
+        target +=1
+
+if stack: 
+    print('Sad') 
+else:
+    print('Nice')