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1. 题目 1.1 英文题目 Given the head of a sorted linked list, delete all duplicates such that each element appears only once. Return the linked list sorted a 阅读全文
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1. 题目 1.1 英文题目 Merge two sorted linked lists and return it as a sorted list. The list should be made by splicing together the nodes of the first two l 阅读全文
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1. 题目 1.1 英文题目 Given a string columnTitle that represents the column title as appear in an Excel sheet, return its corresponding column number. 1.2 中文 阅读全文
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1. 题目 1.1 英文题目 Given an integer columnNumber, return its corresponding column title as it appears in an Excel sheet. 1.2 中文题目 给定一个正整数,返回它在 Excel 表中相对应 阅读全文
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1. 题目 1.1 英文题目 Given a string s, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. 1.2 中文题目 给定一个字符串,验证它是否是 阅读全文
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1. 题目 1.1 英文题目 Given two binary strings a and b, return their sum as a binary string. 1.2 中文题目 给定两个二进制字符串,返回他们的和(用二进制表示)。输入为非空字符串且只包含数字 1 和 0。 1.3输入输出 阅读全文
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1. 题目 1.1 英文题目 Given a string s consists of some words separated by spaces, return the length of the last word in the string. If the last word does no 阅读全文
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1. 题目 1.1 英文题目 Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Clarificat 阅读全文
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1. 题目 1.1 英文题目 Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input strin 阅读全文
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1. 题目 1.1 英文题目 Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty st 阅读全文