原文链接: https://leetcode-cn.com/problems/maximum-69-number
英文原文Given a positive integer num consisting only of digits 6
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原文链接: https://leetcode-cn.com/problems/remove-palindromic-subsequences
英文原文You are given a string s consisting only of
原文链接: https://leetcode-cn.com/problems/sort-integers-by-the-number-of-1-bits
英文原文Given an integer array arr. You have
原文链接: https://leetcode-cn.com/problems/the-k-weakest-rows-in-a-matrix
英文原文You are given an m x n binary matrix mat of
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
原文链接: https://leetcode-cn.com/problems/count-negative-numbers-in-a-sorted-matrix
英文原文Given a m x n matrix grid which i
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/find-the-distance-value-between-two-arrays
英文原文Given two integer arrays arr1 an
原文链接: https://leetcode-cn.com/problems/generate-a-string-with-characters-that-have-odd-counts
英文原文Given an intege
原文链接: https://leetcode-cn.com/problems/lucky-numbers-in-a-matrix
英文原文Given an m x n matrix of distinct numbers, return