大神为啥WA第二个点？数据是7和543543

#include <iostream>
using namespace std;
long long n, x,decday,total;
int main()
{
cin >> x >> n;
if (x==7 || x== 6)
{
	decday = 2 * ((n - (8 - x)) / 7) + 8 - x;
	total = 250 * (n - decday);
	cout << total;
}
else
{
	decday = 2 * ((n - (8 - x)) / 7) + 2;
	total = 250 * (n - decday);
	cout << total;
}
return 0;
}