码迷,mamicode.com
首页 > 其他好文 > 详细

URAL 1787 Turn for MEGA (贪心 + 模拟)

时间:2015-03-04 19:11:46      阅读:131      评论:0      收藏:0      [点我收藏+]

标签:

Turn for MEGA

Time limit: 1.0 second
Memory limit: 64 MB
A traffic light at the turn for the “MEGA” shopping center from the Novomoskovskiy highway works in such a way that k cars are able to take a turn in one minute. At weekends all the residents of the city drive to the mall to take a shopping, which results in a huge traffic jam at the turn. Administration of the mall ordered to install a camera at the nearby bridge, which is able to calculate the number of cars approaching this turn from the city. The observation started n minutes ago. You should use the data from the camera to determine the number of cars currently standing in the traffic jam.

Input

The first line contains integers k and n (1 ≤ kn ≤ 100), which are the number of cars that can take a turn to “MEGA” in one minute and the number of minutes passed from the beginning of observation. The second line contains space-separated integers a1, …, an (0 ≤ ai ≤ 100), where aiis the number of cars that approached the turn during the i-th minute. The observation started at morning, when there were no cars at the turn.

Output

Output the number of cars currently standing in the traffic jam.

Samples

input output
5 3
6 7 2
0
5 3
20 0 0
5




题意:一个路口,可以同时允许k辆车调头,已知n分钟内到达该路口的车辆,问此时还有多少车辆堵在路上不能调头。

解析:按实际的情况模拟即可。该分钟没有通过的车辆,会堵在路口等待下分钟通行,但是即使该分钟通过的车辆不足k,下一分钟还没有来的车辆也不能补上!!!



AC代码:

#include <iostream>
#include <algorithm>
#include <cstdio>
using namespace std;

int main(){
    #ifdef sxk
        freopen("in.txt", "r", stdin);
    #endif //sxk

    int k, n, car;
    while(cin>>k>>n){
        int ans = 0;             //当前未通过的车辆
        for(int i=0; i<n; i++){
            cin>>car;
            if(ans + car > k) ans += car - k;   //不能完全通过 
            else ans = 0;
        }
        cout<<ans<<endl;
    }
    return 0;
}




URAL 1787 Turn for MEGA (贪心 + 模拟)

标签:

原文地址:http://blog.csdn.net/u013446688/article/details/44063111

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!