原文链接: https://leetcode-cn.com/problems/longest-mountain-in-array
英文原文You may recall that an array arr is a mountain ar
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原文链接: https://leetcode-cn.com/problems/backspace-string-compare
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英文原文Given an array of integers nums, half of the intege
原文链接: https://leetcode-cn.com/problems/long-pressed-name
英文原文Your friend is typing his name into a keyboard. Sometimes
原文链接: https://leetcode-cn.com/problems/di-string-match
英文原文A permutation perm of n + 1 integers of all the integers in