import java.util.Scanner;

public class Chokin{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int R = 0;
        int L = sc.nextInt();
        int M = sc.nextInt();
        int N = sc.nextInt();

        if(N >= 25){
            M += N/25;
            N -= 25*(N/25);
        }
        if(M >= 4){
            L += M/4;
            M -= 4*(M/4);
        }
        if(L >= 10){
            R += L/10;
            L -= 10*(L/10);
        }
        System.out.println(L+M+N);
    }
}