CodeForces - 344B id=46665" style="color:blue; text-decoration:none">Simple Molecules Time Limit: 1000MS   Memory Limit: 262144KB   64bit IO Format: %I64d & %I64u id=46665" class="login ui-button ui-widget ui-state-default…

#include<bits/stdc++.h> using namespace std; int main() { int a,b,c; scanf("%d%d%d",&a,&b,&c); int ab=a+b-c,bc=b+c-a,ac=a+c-b; if(ab>=0&&bc>=0&&ac>=0&&ab%2==0&&bc%2==0&&ac%2==0)…

B. The Queue time limit per test:1 second memory limit per test:256 megabytes input:standard input output:standard output Finally! Vasya have come of age and that means he can finally get a passport! To do it, he needs to visit the passport office, b…

C. Exponential notation time limit per test: 2 seconds memory limit per test:256 megabytes input: standard input output: standard output You are given a positive decimal number x. Your task is to convert it to the "simple exponential notation".…

题目链接:http://codeforces.com/problemset/problem/344/B 题目意思:这句话是解题的关键: The number of bonds of an atom in the molecule must be equal to its valence number. 给定三个原子的化学价,规定化学价数等于该原子与另外两个原子所连接的原子键之和. 又一次把简单问题复杂化了.....(以下注释部分读者可以忽略) /* 一开始三重循环枚举,绝对超时(10^6 * 1…

id=46667" style="color:blue; text-decoration:none">CodeForces - 344D id=46667" style="color:blue; text-decoration:none">Alternating Current Time Limit: 1000MS   Memory Limit: 262144KB   64bit IO Format: %I64d & %I64…

E. Read Time time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Mad scientist Mike does not use slow hard disks. His modification of a hard drive has not one, but n different heads that can re…

//题意:给你n个数(可能有重复),问你最多可以取出多少个数使得任意两个数之和为质数.//题解:以为是个C(2,n)复杂度,结果手摸几组,发现从奇偶性考虑,只有两种情况:有1,可以取出所有的1,并可以再取一个偶数(如果这个偶数+1是质数).没有1,如果取了一个奇质数,那只能再拿一个2(如果有2的话). 坑:一度把题目记错了,以为输入的是质数,结果比赛的时候一直wa到orz ac代码: #include<iostream> #include<stdio.h> #include<…

题意:给定 n 个按顺序的命令,但是可能有的命令不全,让你补全所有的命令,并且要求让总数最少. 析:没什么好说的,直接用优先队列模拟就行,insert,直接放入就行了,removeMin,就得判断一下队列是不是空的,然后再考虑getMin,这个是不是对应的值,如果队列中首元素比它大,那么就加上一个, 如果相等直接取出,如果小于就不断取队列中最小元素. 代码如下: #include <bits/stdc++.h> using namespace std; char s[15], t[30]; v…

B. Memory Manager 题目连接: http://www.codeforces.com/contest/7/problem/B Description There is little time left before the release of the first national operating system BerlOS. Some of its components are not finished yet - the memory manager is among th…