#include<iostream>
using namespace std;

int main(void)
{
    int a,b,c;
    
    cin>>a>>b>>c;
    
    if(a>=25)
    {
        b+=a/25;
        a%=25;
    }
    if(b>=4)
    {
        c+=b/4;
        b%=4;
    }
    
    cout<<a+b+c<<endl;
}