Compilare: user.c: In function ‘main’: user.c:42:5: warning: format ‘%ls’ expects argument of type ‘wchar_t *’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(fout, "%lsd\n", a[n - 1] * a[n - 2] * a[n - 3]); ^ user.c:26:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &T); ^ user.c:29:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.c:31:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%ld", &a[i]); ^