[LeetCode] 159. Longest Substring with At Most Two Distinct Characters 最多有兩個不同字符的最長子串
" which its length is 3. 給一個字符串，找出最多有兩個不同字符的最長子串。還是滑動 ...
原文：[LeetCode] 159. Longest Substring with At Most Two Distinct Characters 最多有兩個不同字符的最長子串
Given a strings, find the length of the longest substringtthat containsat most distinct characters. Example : Example : 這道題給我們一個字符串，讓求最多有兩個不同字符的最長子串。那么首先想到的是用 HashMap 來做，HashMap 記錄每個字符的出現次數，然后如果 Hash ...
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