Create 136.cpp

Author: ishika2741

leetcode/cpp/Array/136.cpp

@@ -0,0 +1,11 @@
+class Solution {
+public:
+    int singleNumber(vector<int>& nums) {
+        int ans = 0;
+        for (int i =0;i<nums.size();i++)
+        {
+           ans ^= nums[i];
+        }
+        return ans;
+    }
+};