随笔分类 - Leetcode
摘要：In a given array nums of positive integers, find three non-overlapping subarrays with maximum sum. Each subarray will be of size k, and we want to max
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摘要：Given a string S, find the number of different non-empty palindromic subsequences in S, and return that number modulo 10^9 + 7. A subsequence of a str
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摘要：On an NxN chessboard, a knight starts at the r-th row and c-th column and attempts to make exactly K moves. The rows and columns are 0 indexed, so the
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摘要：Given an unsorted array of integers, find the number of longest increasing subsequence. Example 1: Example 2: Note: Length of the given array will be
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摘要：There is a strange printer with the following two special requirements: The printer can only print a sequence of the same character each time. At each
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摘要：Initially on a notepad only one character 'A' is present. You can perform two operations on this notepad for each step: Given a number n. You have to
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摘要：Given a string, your task is to count how many palindromic substrings in this string. The substrings with different start indexes or end indexes are c
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摘要：You are given n pairs of numbers. In every pair, the first number is always smaller than the second number. Now, we define a pair (c, d) can follow an
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摘要：A message containing letters from A-Z is being encoded to numbers using the following mapping way: 'A' -> 1 'B' -> 2 ... 'Z' -> 26 Beyond that, now th
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摘要：In LeetCode Store, there are some kinds of items to sell. Each item has a price. However, there are some special offers, and a special offer consists
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摘要：Given two integers n and k, find how many different arrays consist of numbers from 1 to n such that there are exactly k inverse pairs. We define an in
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摘要：Given a positive integer n, find the number of non-negative integers less than or equal to n, whose binary representations do NOT contain consecutive
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摘要：There is an m by n grid with a ball. Given the start coordinate (i,j) of the ball, you can move the ball to adjacent cell or cross the grid boundary i
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摘要：Given a positive integer n, return the number of all possible attendance records with length n, which will be regarded as rewardable. The answer may b
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摘要：You are given a string representing an attendance record for a student. The record only contains the following three characters: 'A' : Absent. 'L' : L
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摘要：Given several boxes with different colors represented by different positive numbers. You may experience several rounds to remove boxes until there is
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摘要：Given a list of non-negative numbers and a target integer k, write a function to check if the array has a continuous subarray of size at least 2 that
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摘要：You have n super washing machines on a line. Initially, each washing machine has some dresses or is empty. For each move, you could choose any m (1 ≤
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摘要：Given a string s, find the longest palindromic subsequence's length in s. You may assume that the maximum length of s is 1000. Example 1:Input: "bbbab
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摘要：Given an array of scores that are non-negative integers. Player 1 picks one of the numbers from either end of the array followed by the player 2 and t
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