Compilare: user.c: In function ‘main’: user.c:73:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("progr.out", "w", stdout); ^ user.c:76:14: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] for (fscanf(f, "%d", &T); T; T--) { ^ user.c:77:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &N); ^ user.c:79:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &val[i]); ^