LeetCode 113: Path Sum II 二叉樹遍曆,leetcodesum 部落格轉載請註明地址:http://blog.csdn.net/sunliymonkey/article/details/48164399題目描述給一棵二叉樹,每個節點帶有數字,尋找出從根到葉子節點所有的路徑,使得路徑上的數字之和為給出的sum。Given the below binary tree and sum = 22, 5 / \ 4
hdu3911 Black And White(線段樹區間合并),hdu3911white題意:給一個由0,1組成的序列,有兩種操作,一種是翻轉給定區間的數(0->1,1->0),另一種是查詢給定區間內由1組成的子串的最大長度。重點在區間合并和延遲標記。#include<iostream>#include<cstdio>#include<cstring>#include<cstdlib>#include<algorithm>
【leetcode每日一題】82.Remove Duplicates from Sorted List II,leetcodeduplicates題目:Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list.For example,Given 1->2->3-
[LeetCode 207] Course Schedule,leetcodescheduleThere are a total of n courses you have to take, labeled from 0 to n - 1.Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which
[LeetCode206] Course Schedule II,leetcodeThere are a total of n courses you have to take, labeled from 0 to n - 1.Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is
C++ Primer 學習筆記與思考_10 類型轉換易錯處大總結,primer_10(一)隱式轉換先來看一組範例:int ival=0;ival=3.451+3;首先做加法操作,運算元分別為int和double類型,c++並沒有直接把兩個數加在一起,而是提供了一群組轉換規則,以便在執行算術操作之前,將兩個運算元轉換為同一種資料類型。在這裡是自動執行的,所以他們被成為隱式轉換。因為
[LeetCode202] Happy Number,leetcode202happyWrite an algorithm to determine if a number is "happy".A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares
[LeetCode 229] Majority element II,leetcodemajorityGiven an integer array of size n, find all elements that appear more than⌊ n/3 ⌋ times. The algorithm should run in linear time and in O(1) space.Solution:At most has two elements in the result, can