【字符串】最长无重复子串Longest Substring Without Repeating Characters
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题目:给定一个字符串, 找到其中没有重复字符的最长子串。
例如:string = "abcabcbb" 应返回结果“abc”,长度是3。
C++程序(https://discuss.leetcode.com/topic/24739/c-code-in-9-lines)如下:
int lengthOfLongestSubstring(string s) { vector<int> dict(256, -1); int maxLen = 0, start = -1; for (int i = 0; i != s.length(); i++) { if (dict[s[i]] > start) start = dict[s[i]]; dict[s[i]] = i; maxLen = max(maxLen, i - start); } return maxLen;}
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