diff --git a/16. 3Sum Closest.cpp b/16. 3Sum Closest.md
similarity index 73%
rename from 16. 3Sum Closest.cpp
rename to 16. 3Sum Closest.md
index 4ad793d..6927a62 100644
--- a/16. 3Sum Closest.cpp	
+++ b/16. 3Sum Closest.md	
@@ -1,8 +1,17 @@
-//Two pointer
-//https://leetcode.com/problems/3sum-closest/discuss/8026/Python-solution-(two-pointer).
-//Runtime: 8 ms, faster than 81.20% of C++ online submissions for 3Sum Closest.
-//Memory Usage: 8.2 MB, less than 100.00% of C++ online submissions for 3Sum Closest.
-//time: O(nlogn + n^2)
+# 16. 3Sum Closest
+
+[leetcode - 16. 3Sum Closest](https://leetcode.com/problems/3sum-closest/)
+
+## Two pointer
+https://leetcode.com/problems/3sum-closest/discuss/8026/Python-solution-(two-pointer).
+
+Runtime: 8 ms, faster than 81.20% of C++ online submissions for 3Sum Closest.
+
+Memory Usage: 8.2 MB, less than 100.00% of C++ online submissions for 3Sum Closest.
+
+time: O(nlogn + n^2)
+
+```cpp
 class Solution {
 public:
     int threeSumClosest(vector<int>& nums, int target) {
@@ -40,3 +49,4 @@ class Solution {
         return ans;
     }
 };
+```