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keineahnung2345 · Apr 18, 2022 · 521087d · 521087d
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diff --git a/16. 3Sum Closest.md b/16. 3Sum Closest.md
@@ -11,6 +11,8 @@ Memory Usage: 8.2 MB, less than 100.00% of C++ online submissions for 3Sum Close
 
 time: O(nlogn + n^2)
 
+First sort `nums`, then iterate the sorted `nums`. In each iteration, fix `i` and move `left` and `right` toward center.
+
 ```cpp
 class Solution {
 public: