帮忙看下

#include<stdio.h>
int main()
{
	long long a,b,n,t,day=0;
	int m=0;
	scanf("%lld %lld %lld",&a,&b,&n);
	t=5*a+2*b;
	day=(n/t)*7;
	n=n%t;
	while(n>0)
	{
		for(int i=0;i<5;i++)
		{
			if(n<=0)
			{
				m=1;
				break;
			}
			n=n-a;
			day++;
		}
		if(m==1||n==0)
			break;
		if(n>b)
			day=day+2;
		else day++; 
	}
	printf("%lld",day);
}