题解

#include<iostream>
using namespace std;
int main()
{
	int k,b,xmin,xmax;
	bool a;
	cin>>a>>k>>b>>xmin>>xmax;
	if(a==true)
	{
		if(k<0)
		{
			cout<<k*xmin+b;
		}
		else
		{
			cout<<k*xmax+b;
		}
	}
	else
	{
		if(k>0)
		{
			cout<<k*xmin+b;
		}
		else
		{
			cout<<k*xmax+b;
		}
	}
}