chore: shifting cpp files

cpp/1.two-sum.cpp

@@ -3,15 +3,21 @@
  *
  * [1] Two Sum
  */
-
+#include <vector>
+#include <iostream>
+#include <string>
+#include <algorithm>
+#include <unordered_map>
 // @lc code=start
+using namespace std;
 class Solution
 {
+
 public:
     vector<int> twoSum(vector<int> &nums, int target)
     {
-        std::cout << "twoSum" << std::endl;
-        std::unordered_map<int, int> map;
+        cout << "twoSum" << std::endl;
+        unordered_map<int, int> map;
         for (int i = 0; i < nums.size(); i++)
         {
             map[nums[i]] = i;
@@ -29,3 +35,9 @@ class Solution
     }
 };
 // @lc code=end
+int main(int argc, char const *argv[])
+{
+    /* code */
+    Solution s = Solution();
+    return 0;
+}

cpp/307.range-sum-query-mutable.cpp

@@ -0,0 +1,32 @@
+/*
+ * @lc app=leetcode id=307 lang=cpp
+ *
+ * [307] Range Sum Query - Mutable
+ */
+
+// @lc code=start
+class NumArray
+{
+public:
+    vector<int> x;
+    int sum;
+    NumArray(vector<int> &nums)
+    {
+    }
+
+    void update(int index, int val)
+    {
+    }
+
+    int sumRange(int left, int right)
+    {
+    }
+};
+
+/**
+ * Your NumArray object will be instantiated and called as such:
+ * NumArray* obj = new NumArray(nums);
+ * obj->update(index,val);
+ * int param_2 = obj->sumRange(left,right);
+ */
+// @lc code=end