dalao们！！

写不下去了 救救我！！！

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int x,a=250,n,lei,b,c;
	cin>>x>>n;
	c=n/7;
	b=n%7;
	if(b+x>=7)
	{
		c++;
		b=b+x-7;
		if(b==6||b==7)
		{
			b=0;
			c=c*5;
			lei=c*a;
			cout<<lei;
			return 0;
		}
		else
		{
			c=c*5+b;
			lei=c*a;
			cout<<lei;
			return 0;	
		}
	}
}