import java.util.*;
class Main{
    public static void main(String args[]){
	Scanner scan = new Scanner(System.in);
	int n=scan.nextInt();
	int h,m;
	h=n/3600;
	n%=3600;
	m=n/60;
	n%=60;
	System.out.println(h+":"+m+":"+n);
    }
}
/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