#include <bits/stdc++.h>

using namespace std;


bool Can(long long x)
{
	if(x%3==0)
	return true;
	while(x)
	{
		if(x%10==3)
		return true;
		x/=10;
	}
	return false;
}

int main()
{
	int a,b,c;
	cin>>a>>b>>c;
	int ans=0;
	ans+=c%25;
	b+=c/25;
	ans+=b%4;
	a+=b/4;
	ans+=a%10;
	cout<<ans;
}