Java_Lesson3_Seconds

import java.util.Scanner;

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

        int finish1 = Integer.parseInt(scan.nextLine());
        int finish2 = Integer.parseInt(scan.nextLine());
        int finish3 = Integer.parseInt(scan.nextLine());
        int finish = finish1 + finish2 + finish3;

        if (finish % 60)

        if (finish >= 0 && finish <= 59) {
            System.out.println("0:" + finish);
        } else if (finish >= 60 && finish <=119) {
            System.out.println("1:" + (finish - 60));
        } else if (finish >= 120 && finish <=179) {
            System.out.println("2:" + (finish - 120));
        }

    }
}