import java.io.*;

class Main {
	public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String secStr = br.readLine();
		int sec = Integer.parseInt(secStr);
		int[] hms = {0,0,0};
		for( int i = 0; i < 3 ; i++ ) {
			hms[i] = sec % 60;
			sec = sec / 60;
		}
		System.out.println(hms[2] + ":" + hms[1] + ":" + hms[0]);
	}
}
/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