add codeforces solutions folder

leetcode/lc35.cpp

@@ -0,0 +1,20 @@
+class Solution{
+    public:
+        int searchInsert(vector<int>&nums, int target){
+            int start = 0, end = nums.size() -1;
+            while(start<=end){
+                int mid = left+(right-left)/2;
+                if(nums[mid]==target) return mid;
+
+                if(target<nums[mid]){
+                    end = mid -1;
+                    
+                }
+                else{
+                    start = mid+1;
+                }
+
+            }
+            return start;
+        }
+};