原文链接: https://leetcode-cn.com/problems/check-if-n-and-its-double-exist
英文原文Given an array arr of integers, check if th
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原文链接: https://leetcode-cn.com/problems/minimum-number-of-steps-to-make-two-strings-anagram
英文原文Given two equal-size st
原文链接: https://leetcode-cn.com/problems/tweet-counts-per-frequency
英文原文A social media company is trying to monitor acti
原文链接: https://leetcode-cn.com/problems/find-the-longest-substring-containing-vowels-in-even-counts
英文原文Given the strin
原文链接: https://leetcode-cn.com/problems/how-many-numbers-are-smaller-than-the-current-number
英文原文Given the array nums,
原文链接: https://leetcode-cn.com/problems/cinema-seat-allocation
英文原文
A cinema has n rows of seats, numbered f
原文链接: https://leetcode-cn.com/problems/count-largest-group
英文原文Given an integer n. Each number from 1 to n i
原文链接: https://leetcode-cn.com/problems/construct-k-palindrome-strings
英文原文Given a string s and an integer k. You shoul
原文链接: https://leetcode-cn.com/problems/find-lucky-integer-in-an-array
英文原文Given an array of integers arr, a lucky inte
原文链接: https://leetcode-cn.com/problems/design-underground-system
英文原文An underground railway system is keeping track of
