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A popular masseuse receives a sequence of back-to-back appointment requests and is debating which ones to accept. She needs a break between appointmen 阅读全文
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Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters. This 阅读全文
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Given an array A of integers, return true if and only if we can partition the array into three non-empty parts with equal sums. Formally, we can parti 阅读全文
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Given an integer number n, return the difference between the product of its digits and the sum of its digits. Example 1: Input: n = 234Output: 15 Expl 阅读全文
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We are given a list nums of integers representing a list compressed with run-length encoding. Consider each adjacent pair of elements [a, b] = [nums[2 阅读全文
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Given an array nums of integers, return how many of them contain an even number of digits. Example 1: Input: nums = [12,345,2,6,7896]Output: 2Explanat 阅读全文
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Given a non-negative integer num, return the number of steps to reduce it to zero. If the current number is even, you have to divide it by 2, otherwis 阅读全文
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The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Given two integers x and y, calcul 阅读全文
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Given head which is a reference node to a singly-linked list. The value of each node in the linked list is either 0 or 1. The linked list holds the bi 阅读全文
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两个文件的情况: 制作补丁: $ diff test1.c test2.c > test.patch 给test1.c打补丁: $ patch test1.c < test.patch 还原: $ patch -R test1.c < test.patch 两个文件夹的情况: 制作补丁: $ dif 阅读全文