[LeetCode] 159. Longest Substring with At Most Two Distinct Characters 最多有两个不同字符的最长子串
" which its length is 3. 给一个字符串，找出最多有两个不同字符的最长子串。还是滑动 ...
原文：[LeetCode] 159. Longest Substring with At Most Two Distinct Characters 最多有两个不同字符的最长子串
Given a strings, find the length of the longest substringtthat containsat most distinct characters. Example : Example : 这道题给我们一个字符串，让求最多有两个不同字符的最长子串。那么首先想到的是用 HashMap 来做，HashMap 记录每个字符的出现次数，然后如果 Hash ...
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