#include <stdio.h>

struct time
{
    int hour;
    int minutes;
    int seconds;
};


int main()
{
    int time_in_sec,hour,min,sec;
    struct time curr_time;
    do
    {
        printf("Give  Hours - Minutes - Seconds : ");
        scanf("%d %d %d", &curr_time.hour, &curr_time.minutes, &curr_time.seconds);
    }
    while((curr_time.hour<0 || curr_time.hour>=12) || (curr_time.minutes<0 || curr_time.minutes>60) || (curr_time.seconds<0 || curr_time.seconds>60)); //elegxos timwn wste h wra pou dinei o xrhsths na einai swsth

    time_in_sec=curr_time.hour*3600+curr_time.minutes*60+curr_time.seconds; // metatropi ths wra se second gia pio eukolh xrhsh

    if(time_in_sec - 59 < 0)
    {
        int i = 0;
        int count = 0;
        while(i <= 59 && time_in_sec != 0)
        {
            time_in_sec = time_in_sec - 1;
            count = count + 1;
            i = i + 1;
        }
        time_in_sec = 11 * 3600 + 59 * 60 + 60;
        time_in_sec = time_in_sec  - (59 - count);
    }
    else
    {
        time_in_sec = time_in_sec - 59;
    }
    hour = time_in_sec / 3600;
    min = time_in_sec % 3600 / 60;
    sec = time_in_sec % 3600 % 60;
    printf("%d : %d : %d", hour , min , sec);
    system("PAUSE");
    return 0;
}