Merge pull request #6760 from TheNourhan/add-solution-to-two-sum-on-l…

…eetCode

add solution to (two sum) problem on leetCode with c++

code/online_challenges/src/leetcode/two_sum/two_sum.cpp

@@ -0,0 +1,34 @@
+#include<bits/stdc++.h>
+using namespace std;
+//O(n^2)
+class Solution {
+public:
+    vector<int> twoSum(vector<int>& nums, int target){
+        vector<int>res;
+
+        for(int i=0;i<(int)nums.size();++i){
+            for(int j=i+1;j<(int)nums.size();++j){
+                if(nums[i]+nums[j]==target){
+                    res.push_back(i);
+                    res.push_back(j);
+                    return res;
+                }
+            }
+        }
+
+        return res;
+    }
+};
+
+int main(){
+    vector<int>numbers {2,7,11,15};
+    vector<int>result;
+
+    result = Solution().twoSum(numbers, 9);
+
+    for(int i=0;i<(int)result.size();++i){
+        cout<<result[i]<< " ";
+    }
+
+    return 0;
+}