[백준] 10707번 : 수도요금 - C++

https://www.acmicpc.net/problem/10707

#include <iostream>

using namespace std;

int main() {
    int a,b,c,d,p;
    cin>>a>>b>>c>>d>>p;
    int sum=p*a;
    int sum1=0;
    if(p<=c) sum1=b;
    else sum1=b+(p-c)*d;
    cout<<min(sum,sum1);
}