problem 51

#include <stdio.h>

typedef struct {
    int hour;
    int minute;
    int second;
} time_struct;

int main() {

    time_struct time;

    time.hour = 16;
    time.minute = 40;
    time.second = 51;

    printf("%02d:%02d:%02d\n", time.hour, time.minute, time.second);

    return 0;
}