import java.util.*;

public class Yukicoder_32{
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		int L = stdIn.nextInt();
		int M = stdIn.nextInt();
		int N = stdIn.nextInt();
		int K = 0;
		int count = N/25;
		N -= count*25;
		M += count;
		count = M/4;
		M -= count*4;
		L += count;
		count = L/10;
		L -= count*10;
		K = count;

		System.out.println(L+M+N);
	}
}