Compilare: user.c: In function ‘main’: user.c:21:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fdin, "%d", &n); ^ user.c:23:32: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] for (i = 0; i < n; i++) fscanf(fdin, "%d", &v[i]); ^ user.c:50:16: warning: ‘pos’ may be used uninitialized in this function [-Wmaybe-uninitialized] build_solution(pos, fdout); ^