#include <stdio.h>
int main(void){
	int distance = 0;
	scanf("%d",&distance);
	
	int hour = 10;
	int minute = 0;
	
	hour += distance / 100;
	minute += (distance % 100) * 0.6;
	
	if(minute < 10){
		printf("%d:0%d",hour,minute);	
	}else{
		printf("%d:%d",hour,minute);
	}
	
}