Codeforces965—A：Paper Airplanes（思维）_codeforces -965a

链接：Codeforce965—A题传送门

题目
To make a paper airplane, one has to use a rectangular piece of paper. From a sheet of standard size you can make s airplanes.

A group of k people decided to make n airplanes each. They are going to buy several packs of paper, each of them containing p sheets, and then distribute the sheets between the people. Each person should have enough sheets to make n airplanes. How many packs should they buy?

题意
k个人要叠纸飞机，每个人要叠n个纸飞机，一张纸能叠s个飞机，买纸只能一包一包买，一包有p张纸。
问你他们最少要买几包纸？

思路
题目有点绕，看清楚每个变量的意义。
首先算出每个人需要几张纸，然后算出一共需要多少张，最后算一下要多少包就好。
需要注意的是第二个样例中，一张纸能叠100个飞机，但是我们还是只叠一个。所以就是宁可浪费也不少买。（杜绝浪费！）

看一下代码，伊丽莎白！

代码

//double ceil(double x): 返回大于或者等于x的最小整数
#include<bits/stdc++.h>
using namespace std;
int main()
{
    double k,n,s,p;
    cin>>k>>n>>s>>p;
    double ans=ceil(n/s);
    cout<<int(ceil(ans*k/p))<<endl;
}
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水水水~~