随笔分类 - leetcode
摘要：Minimum Sum of Four Digit Number After Splitting Digits You are given a positive integer num consisting of exactly four digits. Split num into two new
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摘要：Sum of Unique Elements You are given an integer array nums. The unique elements of an array are the elements that appear exactly once in the array. Re
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摘要：Largest Perimeter Triangle Given an integer array nums, return the largest perimeter of a triangle with a non-zero area, formed from three of these le
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摘要：Consecutive Characters The power of the string is the maximum length of a non-empty substring that contains only one unique character. Given a string
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摘要：Valid Palindrome II Given a string s, return true if the s can be palindrome after deleting at most one character from it. Example 1: Input: s = "aba"
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摘要：Occurrences After Bigram second third", where second comes immediately after first, and third comes immediately after second. Return an array of all t
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摘要：Remove Palindromic Subsequences You are given a string s consisting only of letters 'a' and 'b'. In a single step you can remove one palindromic subse
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摘要：Count Good Triplets Given an array of integers arr, and three integers a, b and c. You need to find the number of good triplets. A triplet (arr[i], ar
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摘要：Binary Search Given an array of integers nums which is sorted in ascending order, and an integer target, write a function to search target in nums. If
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摘要：Minimum Changes To Make Alternatign Binary String You are given a string s consisting only of the characters '0' and '1'. In one operation, you can ch
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摘要：Minimum Hours of Training to Win a Competition You are entering a competition, and are given two positive integers initialEnergy and initialExperience
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摘要：Minimum Index Sum of Two Lists Given two arrays of strings list1 and list2, find the common strings with the least index sum. A common string is a str
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摘要：Number Complement The complement of an integer is the integer you get when you flip all the 0's to 1's and all the 1's to 0's in its binary representa
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摘要：Decompress Run-length Encoded List We are given a list nums of integers representing a list compressed with run-length encoding. Consider each adjacen
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摘要：NimGame You are playing the following Nim Game with your friend: Initially, there is a heap of stones on the table. You and your friend will alternate
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摘要：Self Dividing Numbers A self-dividing number is a number that is divisible by every digit it contains. For example, 128 is a self-dividing number beca
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摘要：Is Subsequence Given two strings s and t, return true if s is a subsequence of t, or false otherwise. A subsequence of a string is a new string that i
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摘要：Make Array Zero by Subtracting Equal Amounts You are given a non-negative integer array nums. In one operation, you must: Choose a positive integer x
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摘要：Find Closest Number To Zero Given an integer array nums of size n, return the number with the value closest to 0 in nums. If there are multiple answer
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摘要：Summary Ranges You are given a sorted unique integer array nums. A range [a,b] is the set of all integers from a to b (inclusive). Return the smallest
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