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

int main(int argc, char * argv[]) {
	double airspeed, windspeed, distance;

	printf("Veuillez donner la vitesse de l'avion, du vent et la distance à parcourir : ");
	scanf("%lf %lf %lf", &airspeed, &windspeed, &distance);

	double groundspeed = airspeed - windspeed;
	double hoursmins = distance / groundspeed;
	int hours = trunc(hoursmins);
	int mins = (int)((hoursmins-hours) * 60);


	printf("Le vol durera ~%d heure%s et %d minute%s.\n",
		hours, hours > 1 ? "s" : "", mins, mins > 1 ? "s" : "");
	return EXIT_SUCCESS;
}