diff --git a/two_sum b/two_sum
new file mode 100755
index 0000000..59e32fe
Binary files /dev/null and b/two_sum differ
diff --git a/two_sum.cpp b/two_sum.cpp
index ac6a162..eb757bd 100644
--- a/two_sum.cpp
+++ b/two_sum.cpp
@@ -7,7 +7,7 @@ vector<int> twoSum(vector<int>& nums, int target) {
     int n = nums.size();
     for (int i = 0; i < n; i++) {
         for (int j = 0; j < n; j++) {
-            if (/* TODO */) {
+            if (i != j && nums[i] + nums[j] == target) {
                 // found pair
                 return {i, j};
             }