#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define TAM 100000

int existe(int *v, int n)
{
    int i;
    for(i = 0; i < TAM; ++i) {
        if(v[i] == n) {
            return 1;
        }
    }
    return 0;
}
int proximoValor(int *v)
{
    int r;
    srand((unsigned int)time((time_t *)NULL));
    do {
        r = rand() % (TAM+1);
    } while(existe(v, r)); // se o número já existe, randomiza de novo

    return r;
}
int main()
{
    int i, v[TAM], idd, j;
    FILE *aqv;
    aqv=fopen("Alunos.txt","w");
    srand(time(NULL));
    for(i=0;i<TAM;i++){
        v[i] = proximoValor(v);
        idd = 18 +(rand() %10);
        fprintf(aqv,"Igor%i %i %i\n",i,idd,v[i]);
        fclose(aqv);
        aqv=fopen("Alunos.txt","a");
    }
    return 0;
}