add 136

Author: frankcis-sh

.idea/workspace.xml

@@ -0,0 +1,9 @@
+package leetcode
+
+func singleNumberV2(nums []int) int {
+	result := 0
+	for i := 0; i < len(nums); i++ {
+		result ^= nums[i]
+	}
+	return result
+}