牛客网暑期ACM多校训练营（第四场） J 贪心

链接：

https://www.nowcoder.com/acm/contest/143/J

#include<bits/stdc++.h>
using namespace std;
long long n, p2, p3;
int main(){
    cin >> n >> p2 >> p3;
    double c2 = p2 / 2.0, c3 = p3 / 3.0;

    if(n == ) cout << (long long)(p2 < p3 ? p2 : p3) << "\n";

    else if(c2 <= c3){
        if(n %  == ){
            cout << n /  * p2 << "\n";
        }else{
            long long temp = p3 - p2;
            temp = temp < p2 ? temp : p2;
            cout << n /  * p2 + temp << "\n";
        }
    }else {
        if(n% == ){
            cout << n /  * p3 << "\n";
        }else if(n %  == ){
            long long temp = p2;
            temp = temp < p3 ? temp : p3;
            temp = temp <  * p2 - p3 ? temp :  * p2 - p3;

            cout << n/ * p3 + temp << "\n";
        }else if(n %  == ){
            long long temp = p2;

            temp = temp < p3 ? temp : p3;

            cout << n/ * p3 + temp << "\n";
        }
    }
    return ;
}