[Leetcode] Longest Substring Without Repeating Characters
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class Solution {public: int lengthOfLongestSubstring(string s) { // Start typing your C/C++ solution below // DO NOT write int main() function if (s.size() == 0) return 0; int buf[256]; for (int i = 0; i < 256; ++i) buf[i] = -1; int front = 0; buf[s[front]] = 0; int maxLen = 1; int curLen; for (int i = 1; i < s.size(); ++i) { if (buf[s[i]] != -1) { if (buf[s[i]] >= front) front = buf[s[i]] + 1; buf[s[i]] = i; } else buf[s[i]] = i; curLen = i - front + 1; if (curLen > maxLen) maxLen = curLen; } return maxLen; }};- LeetCode: Longest Substring Without Repeating Characters
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