import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int oneH = sc.nextInt();
		int tweF = sc.nextInt();
		int oneC = sc.nextInt();
		sc.close();
		if(oneC>=25){
			tweF += oneC/25;
			oneC = oneC%25;
		}
		if(tweF>=4){
			oneH += tweF/4;
			tweF = tweF%4;
		}
		if(oneH>=10){
			oneH = oneH%10;
		}
		System.out.println(oneH + tweF + oneC);
	}// mainmethod

} // class