P1909 买铅笔

https://www.luogu.org/problem/P1909

 

#include <iostream> using namespace std; int main() {     int n,num1,price1,num2,price2,num3,price3;     cin>>n>>num1>>price1>>num2>>price2>>num3>>price3;     int total1=((n+num1-1)/num1)*price1;     int total2=((n+num2-1)/num2)*price2;     int total3=((n+num3-1)/num3)*price3;     if(total1>total2)         total1=total2;     if(total1>total3)         total1=total3;     cout<<total1<<endl;     return 0; }