随笔分类 - leetcode
摘要：Reverse a singly linked list.
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摘要：Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 3 -
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摘要：Given a singly linked list, determine if it is a palindrome. Follow up:Could you do it in O(n) time and O(1) space?
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摘要：Given a list, rotate the list to the right by k places, where k is non-negative. For example:Given 1->2->3->4->5->NULL and k = 2,return 4->5->1->2->3-
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摘要：Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. 暴力 KMP 以后写。。
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摘要：Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,
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摘要：Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in or
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摘要：Given an array of integers, every element appears three times except for one. Find that single one. Note:Your algorithm should have a linear runtime c
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摘要：Given an array of numbers nums, in which exactly two elements appear only once and all the other elements appear exactly twice. Find the two elements
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摘要：Given an array of integers, every element appears twice except for one. Find that single one. Note:Your algorithm should have a linear runtime complex
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摘要：Given a non negative integer number num. For every numbers i in the range 0 ≤ i ≤ num calculate the number of 1's in their binary representation and r
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摘要：Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For exa
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摘要：Given an integer, write a function to determine if it is a power of two. 2的幂数二进制只有一个1
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摘要：You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you cl
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摘要：Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the
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摘要：Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements. For example, giv
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摘要：Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. For example: Given num = 38, the process is like:
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摘要：You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 ston
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摘要：Given an integer (signed 32 bits), write a function to check whether it is a power of 4. Example:Given num = 16, return true. Given num = 5, return fa
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摘要：Write a function that takes a string as input and returns the string reversed. Example:Given s = "hello", return "olleh".
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