JOI 2017 Yo 1st

1.cpp

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <functional>
#include <queue>
#include <cmath>
#include <cstring>

int main() {
    int a, b, c, d, e;

    std::cin >> a >> b >> c >> d >> e;

    if(a < 0) {
        std::cout << c * (0 - a) + d + e * b << std::endl;
    }else {
        std::cout << e * (b - a) << std::endl;
    }
}