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

#define SIZE 1009

struct no {
    char matricula[6];
    struct no *next;
};

typedef struct no *TABELA[SIZE];

int insert(Tabela t,int pos,char matricula[6]){
    struct no* auxn = malloc(sizeof(struct no));
    TABELA t = NULL;
    auxt=t;

    if(auxt){
        while(auxt[pos]){
            if(strcmp(auxt[pos]->matricula,matricula)==0)
                pos=-1;
            auxt[pos] = auxt[pos]->next;
        }
        if(pos!=-1)
            auxt[pos]->matricula = matricula;
    }
    else{
        auxt = calloc(sizeof(struct no),SIZE);
        auxt[pos] = malloc(sizeof(struct no));
        auxt[pos]->matricula = matricula;
    }
    return pos;
}

int main(){
    TABELA t = NULL;
    char matricula[6] = "BMW";
    int r = insert(t,1,matricula);
    printf("%d\n",r);
return 0;
}