大佬们看一看有何错误o_o

代码如下：

#include<bits/stdc++.h>
using namespace std;
int n, a, a1, a2=0, b2=0, c2=0, b, b1, c, c1;
int main() {
	cin >> n >> a >> a1 >> b >> b1 >> c >> c1;
	a2=n/a*a1;
	if(a1%n!=0)
		a2+=a1;
	b2=n/b*b1;
	if(b1%n!=0)
		b2+=b1;
	c2=n/c*c1;
	if(c1%n!=0)
		c2+=c1;
	if(a2>b2)
		a2=b2;
	if(a2>c2)
		a2=c2;
	printf("%d",a2);
	return 0;
}