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

typedef struct {
    char tab[50];
    int indice_debut;
    int indice_fin;
    int taille;
} car_file;


char dequeue(car_file* f){
    f->indice_debut=(f->indice_debut+1)%50;
    f-taille--;
    return f->tab[(f->indice_debut+49)%50];
}




int main(void){


    return 0;
}