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| // @Title: 无重复字符的最长子串 (Longest Substring Without Repeating Characters)
// @Author: 15816537946@163.com
// @Date: 2022-03-23 19:23:25
// @Runtime: 4 ms
// @Memory: 2.9 MB
func lengthOfLongestSubstring(s string) int {
var lo, hi, ret int
r := make(map[byte]int)
for hi < len(s) {
r[s[hi]]++
for r[s[hi]] > 1 {
r[s[lo]]--
lo++
}
ret = max(ret, hi-lo+1)
hi++
}
return ret
}
func max(a, b int) int {
if a > b {
return a
}
return b
}
|