#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <stdlib.h>

int main() {
    int interval = -1, hours = -1, minutes = -1, startingTime = -1, endingTime = -1, busCount = 0, totalTime;
    char temp;

    // Getting starting time and converting into minutes
    printf("Starting time (hh:mm)\n> ");
    scanf("%i%c%i", &hours, &temp, &minutes);
    if (hours >= 25 || minutes >= 61 || hours < 0 || minutes < 0) {
        printf("Invalid time");
        return 1;
    }
    startingTime = hours * 60 + minutes;

    // Getting ending time and converting into minutes
    printf("Ending time (hh:mm)\n> ");
    scanf("%i%c%i", &hours, &temp, &minutes);
    if (hours >= 25 || minutes >= 61 || hours < 0 || minutes < 0) {
        printf("Invalid time");
        return 1;
    }
    endingTime = hours * 60 + minutes;

!   if (endingTime < startingTime) {
!       endingTime += (24 * 60);
!   }

    // Getting interval
    printf("Interval (m)\n> ");
    scanf("%i", &interval);

    // Counting total time
    totalTime = endingTime - startingTime;

    for (startingTime; startingTime <= endingTime; startingTime += interval) {
!       if (startingTime >= (24 * 60)) {
!           startingTime = 0;
!           endingTime -= (24 * 60);
!       }
        busCount++;
        minutes = startingTime % 60;
        hours = (startingTime - minutes) / 60;
        printf("%02i:%02i ", hours, minutes);
        if (busCount % 3 == 0) {
            printf("Barrier-free bus");
        }
        printf("\n");
    }

    // Converting total time into (hh:mm)
    minutes = totalTime % 60;
    hours = (totalTime - minutes) / 60;

    // Output
    printf("\n\t\t==++STATISTICS++==\n\n\tTimeframe: %i minutes or %02i:%02i\n", totalTime, hours, minutes);
    printf("\tTotal buses in given time period: %i\n\tTotal barrier-free buses: %i\n\n", busCount, busCount / 3);

    return 0;
}