题目： There are N gas stations along a circular route, where the amount of gas at station i …

1. 题目 Implement pow(x, n). 2. 思路 每次翻倍，如果当前翻倍的幂次在n的二进制位内，则乘入最后结果中，否则跳过继续。特殊场景较多，要特别考虑： 幂次n可能是负数，这是要注意转换为正数后，最后求…

Analysis Brute-force solution Apparently, a straightforward brute-force solution would be to store every {key,…

/* 125. Valid Palindrome My Submissions Question Total Accepted: 94559 Total Submissions: 401331 Difficulty: E…

My code: import java.util.Arrays; import java.util.List; public class Solution { class Node { int val = 0; int…

Given a sorted array of integers nums and integer values a, b and c. Apply a function of the form f(x) = ax2 +…

这道题不能用go写，所以用C语言写的 题目 Given a linked list, determine if it has a cycle in it. Follow up: Can you solve it with…

  Write a function to generate the generalized abbreviations of a word. Example: Given word = "word"…

  Given n nodes labeled from 0 to n – 1 and a list of undirected edges (each edge is a pair of node…

  You are given an array of positive and negative integers. If a number n at an index is positive, then m…

  Given a binary array, find the maximum number of consecutive 1s in this array if you can flip at most o…

Analysis Oveiously, in order to solve this question, we have to iterate through all of the possible cases at l…