runner.c

#include <stdio.h>

struct Time {
    int hours;
    int minutes;
    int seconds;
};

struct Runner {
    char name[20];
    int age;
    struct Time start_time;
    struct Time end_time;
};

int compareTime(struct Time t1, struct Time t2) {
    if (t1.hours > t2.hours) {
        return -1;
    } else if (t1.hours < t2.hours) {
        return 1;
    } else {
        if (t1.minutes > t2.minutes) {
            return -1;
        } else if (t1.minutes < t2.minutes) {
            return 1;
        } else {
            if (t1.seconds > t2.seconds) {
                return -1;
            } else if (t1.seconds < t2.seconds) {
                return 1;
            } else {
                return 0;
            }
        }
    }
}

struct Time calculateDifference(struct Time t1, struct Time t2) {
    struct Time result;
    result.hours = t2.hours - t1.hours;
    result.minutes = t2.minutes - t1.minutes;
    result.seconds = t2.seconds - t1.seconds;
    if (result.seconds < 0) {
        result.minutes--;
        result.seconds += 60;
    }
    if (result.minutes < 0) {
        result.hours--;
        result.minutes += 60;
    }
    return result;
}

void winner(struct Runner runner[]) {
    for (i = 0; i < 19; i++) {
        for (j = 0; j < 19 - i; j++) {
            if (compareTime(calculateDifference(runner[j].start_time, runner[j].end_time), calculateDifference(runner[j + 1].start_time, runner[j + 1].end_time)) == -1) {
                struct Runner temp;
                temp = runner[j];
                runner[j] = runner[j + 1];
                runner[j + 1] = temp;
            }
        }
    }

    printf("%s\n", runner[0].name);
} 

int main() {
    struct Runner runner[20];
    int i, j;

    for (i = 0; i < 20; i++) {
        scanf("%s", &runner[i].name);
        scanf("%d", &runner[i].age);
        scanf("%d:%d:%d", &runner[i].start_time.hours, &runner[i].start_time.minutes, &runner[i].start_time.seconds);
        scanf("%d:%d:%d", &runner[i].end_time.hours, &runner[i].end_time.minutes, &runner[i].end_time.seconds);
    }

    winner(runner);

    return 0;
}