import java.util.Scanner;

public class Coin {
    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
        int[] coins = new int[3];

        for (int i = 0; i < coins.length; i++) {
            coins[i] = stdIn.nextInt();
        }

        while (coins[2] >= 25) {
            coins[2] -= 25;
            coins[1]++;
        }

        while (coins[1] >= 4) {
            coins[1] -= 4;
            coins[0]++;
        }

        while (coins[0] >= 10) {
            coins[0]-=10;
        }

        System.out.println(coins[0] + coins[1] + coins[2]);

    }
}