07b. Sum Seconds

/*
 * Simple Conditions
 */
import java.util.Scanner;

public class _07b_SumSeconds
{
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);
        int totalSeconds = 0;

        // Using 'for' loop to input and sum all seconds
        for (int i = 0; i < 3; i++) {
            totalSeconds += Integer.parseInt(scan.nextLine());
        }
        System.out.printf("%d:%02d", (totalSeconds / 60), (totalSeconds % 60));
    }
}