typedef struct Tache Tache;

struct Tache
{
    char task;
    int duree;
    char contraintes[15];
    int nb_contraintes;
};

typedef struct Arc Arc;

struct Arc
{
    char initiale;
    int duree;
    char terminale;
};


typedef struct Date Date;

struct Date
{
    char task;
    int tot;
    int tard;
    int libre;
};