0074 - Videotape

#include <cstdio>
#include <iostream>
using namespace std;

void Slove(int hour, int minute, int second)	{
	int number=(2*3600)-(hour*3600+minute*60+second);

	printf ("%02d:%02d:%02d\n", number/3600, (number%3600)/60, number%3600%60 );
	printf ("%02d:%02d:%02d\n", number*3/3600, (number*3)%3600/60, (number*3)%3600%60);
}

int main(void)	{
	int hour, minute, second;

	cin >> hour >> minute >> second;
	while ( !(hour==-1 && minute==-1 && second==-1) )	{
		Slove(hour,minute,second);
		cin >> hour >> minute >> second;
	}
	return 0;
}

やるだけ。