Compilare: user.c: In function ‘main’: user.c:111:11: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("biscuiti.in", "r", stdin); ^ user.c:112:11: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("biscuiti.out", "w", stdout); ^ user.c:114:16: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] int n; scanf ("%d", &n); ^ user.c:120:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] int x; scanf ("%d", &x); ^