import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int math = scanner.nextInt();
int history = scanner.nextInt();
int geometry = scanner.nextInt();
//ваш код
int time = 60;
int result = math + history + geometry;
int x = result % time;
int y = result / time;
int vivod = y + x;
System.out.println(vivod);
}
}