Compilare: user.c: In function ‘main’: user.c:83:11: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("bleach.in", "r", stdin); ^ user.c:84:11: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("bleach.out", "w", stdout); ^ user.c:87:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%lld%lld", &n, &k); ^ user.c:92:11: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%lld", &x); ^ user.c:116:13: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%lld", &x); ^