无分类 leetcode讲解–953. Verifying an Alien Dictionary In an alien language, surprisingly they also use english lowercase letters, but possibly in a different order. The order of the alphabet is some permutation of lowercase letters.
无分类 leetcode讲解–884. Uncommon Words from Two Sentences We are given two sentences A and B. (A sentence is a string of space separated words. Each word consists only of lowercase letters.)
无分类 leetcode讲解–942. DI String Match Given a string S that only contains “I” (increase) or “D” (decrease), let N = S.length.
