由于是输出任意一组解,可以将价值从小到大进行排序,第一个人只选第一个,第二个人选其余的.再比较一下第一个人选的元素和第二个人所选元素和是否相等即可.由于已将所有元素价值从小到大排过序,这样可以保证在有解的情况下一定可以构造出可行解. Code: #include<iostream> #include<algorithm> using namespace std; const int maxn = 100000 + 3; int a[maxn], A[maxn]; bool cmp(…

Beru-taxi 题目链接: http://codeforces.com/contest/706/problem/A Description Vasiliy lives at point (a, b) of the coordinate plane. He is hurrying up to work so he wants to get out of his house as soon as possible. New app suggested n available Beru-taxi…

Codeforces Round #575 (Div. 3) 这个div3打的太差了,心态都崩了. B. Odd Sum Segments B 题我就想了很久,这个题目我是找的奇数的个数,因为奇数想分成x个奇数,那么这个x肯定是一个奇数, 偶数同理,如果一个偶数想分成y个奇数,那么这个y肯定是一个偶数. 所以数奇数的个数,如果奇数有x个,x是偶数,那么k一定是一个偶数,如果x是一个奇数,那么k肯定是一个奇数. 输出也比较简单,因为奇数要分成奇数个,所以可以前面每组都是含有一个奇数,最后肯定会有奇…

A. Uncowed Forces Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/604/problem/A Description Kevin Sun has just finished competing in Codeforces Round #334! The round was 120 minutes long and featured five problems with maxi…

B. Pasha Maximizes time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Pasha has a positive integer a without leading zeroes. Today he decided that the number is too small and he should make it…

目录 Codeforces 998 A.Balloons B.Cutting C.Convert to Ones D.Roman Digits E.Sky Full of Stars(容斥 计数) Codeforces 998 比赛链接 A.Balloons 输出啥看错WA\(*2\)+第一次写sort写了cmp()但是没加cmpWA\(*2\)(结构体重载运算符后遗症).. 没谁了. #include <cstdio> #include <cctype> #include <…

Cutting There are a lot of things which could be cut — trees, paper, “the rope”. In this problem you are going to cut a sequence of integers. There is a sequence of integers, which contains the equal number of even and odd numbers. Given a limited bu…

C - Convert to Ones 给你一个01串 x是反转任意子串的代价 y是将子串全部取相反的代价 问全部变成1的最小代价 两种可能 一种把1全部放到一边 然后把剩下的0变成1  要么把所有的 0 直接变成1 #include<bits/stdc++.h> using namespace std; #define LL long long int main(){ LL n,x,y; string a; cin>>n>>x>>y>>a; ;…

A. /* 发现每次反转或者消除都会减少一段0 当0只有一段时只能消除 这样判断一下就行 */ #include<cstdio> #include<algorithm> #include<cstring> #include<iostream> #include<set> #include<map> #define M 300010 #define ll long long using namespace std; int read()…

D. Roman Digits time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Let's introduce a number system which is based on a roman digits. There are digits I, V, X, L which correspond to the numbers…