Hello Codeforces — ers, I have this problem need to solve Given an array a with N integers (1 <= N <= 500000) Given Q queries (1 <= Q <= 100000), for each query, we have 2 integers L and R, we have to find the maximum value of a[x] + a[y] + a[z] with sastifies...
If there is no solution, print a single integer−1−1. Otherwise, print an integerkk— the number of operations to perform, followed bykklines, each containing two integersiiandjj(1≤i≤n1≤i≤n,1≤j≤m1≤j≤m) — the integers chosen for the operation. ...
In brief, on the contests held by Codeforces rules you write solutions to the problems that are tested during the contest on a very small number of tests. Those who have passed that set of solution tests, their authors can block (refuse to resend the solutions of this task in future even...
is bitwise xor operation (see notes for explanation). Immediately, Mehrdad discovered a terrible solution that nobody trusted. Now Arpa needs your help to implement the solution to that problem. Input First line contains two integers n and x (1 ≤ n ≤ 105, 0 ≤ x ≤...
【题目链接】:http://codeforces.com/contest/742/problem/B 【题解】 用个map记录1..i-1里面x xor a[i]的值有多少个; 则那些数字都能和a[i]进行xor运算取得a[i]; 因为a xor b = c 则c xor b = a 且c xor a = b; O(n)枚举搞一下就好; ...
codeforces742B Arpa’s obvious problem and Mehrdad’s terrible solution(水) 题意: 给出一系列数字,求两两异或为x有几对。 要点: 看范围10^5就知道直接循环肯定gg,所以用一个num[x]存储x出现过几次,一般用两个for可以简化,像下面这样: #include<cstdio>#include<iostream>#include<cstring>#include<...
【题目链接】:http://codeforces.com/contest/742/problem/B 【题解】 用个map记录1..i-1里面x xor a[i]的值有多少个; 则那些数字都能和a[i]进行xor运算取得a[i]; 因为a xor b = c 则c xor b = a 且c xor a = b; O(n)枚举搞一下就好; ...
CodeForces - 742B Arpa’s obvious problem and Mehrdad’s terrible solution (位运算) 题目链接:http://codeforces.com/problemset/problem/742/B点击打开链接 B. Arpa’s obvious problem and Mehrdad’s terrible solution time limit per test 1 second memory limit per test 256 megabytes input s......
Problem Solving and Contest Solutions...This repository contains my solutions to various problems from Codeforces contests. Each solution is implemented in C++ and includes a brief explanation of the approach used to solve the problem. The repository is
CodeForces 742B Arpa’s obvious problem and Mehrdad’s terrible solution (暴力枚举),题意:求定n个数,求有多少对数满足,ai^bi=x。析:暴力枚举就行,n的复杂度。代码如下: