import java.util.Scanner;

/**
 * No.32 貯金箱の憂鬱
 */
public class MelancholyOfPiggyBank {

	public static void main(String[] args) {

        // 標準入力から読み込む際に、Scannerオブジェクトを使う。
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();	// 100円
        int b = sc.nextInt();	//  25円
        int c = sc.nextInt();	//　　　1円

        int upCoinNum = 0;
        int restCoinNum = 0;
        int sumCoinNum = 0;
        
        if (0 != c) {
        	upCoinNum = (int)Math.floor(c / 25);
        	restCoinNum = c % 25;
        	b += upCoinNum;
        	sumCoinNum += restCoinNum; 
        }
        if (0 != b) {
        	upCoinNum = (int)Math.floor((b)/ 4);
        	restCoinNum = b % 4;
        	a += upCoinNum;
        	sumCoinNum += restCoinNum; 
        }
        if (0 != a) {
        	restCoinNum = a % 10;
        	sumCoinNum += restCoinNum; 
        }
        System.out.println(sumCoinNum);
	}

}