import java.util.Scanner;
class Main{
    int x,h,m,m1,s,s1;  
    public void yatary() {
        Scanner sc = new Scanner(System.in);
        x =sc.nextInt();
        h =x / 3600; 
        m =x % 3600;
        m1 = m / 60;
        s = x % 3600;
        s1 = s % 60;
        System.out.println(h + ":" + m1 + ":" + s1);
    }
    public static void main(String[] args){
    new Main().yatary();
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz