[Leetcode] Balanced Binary Tree
問題：給一個二叉樹，寫一個算法判斷這個樹是不是balanced。 Solution #1. 第一次遇到這個問題時我的解法，如下： 寫了一個getDepth()函數，訪問每個節點都要調用一次這個函數。這個Solution也通過了leetcode的驗證程序，但是后來想了想，I ...
原文：[LeetCode 1234] Replace the Substring for Balanced String
You are given a string containing only kinds of characters Q , W , E and R . A string is said to bebalancedif each of its characters appearsn times wherenis the length of the string. Return the minimu ...
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