#include<iostream> 
using namespace std;
int n , m , a;
int main()
{
	cin >> n >> m >> a;
	int day = 0 , num = 0;
	while(true)
	{
		for(int i = 1; i <= 5; i++)
		{
			day++;
			num += n;
			if(num >= a)break;
		}
		for(int i = 1; i <= 2; i++)
		{
			day++;
			num += m;
			if(num >= a)break;
		}
	}
	cout << day;
	return 0;
}  

?

为啥全TLE