Compilare: user.c: In function ‘main’: user.c:19:1: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] (void) freopen(IN, "r", stdin); ^ user.c:20:1: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] (void) freopen(OUT, "w", stdout); ^ user.c:22:1: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void) scanf("%ld", &n); ^ user.c:23:25: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] for(i = 1; i <= n; ++i) (void) scanf("%ld", &v[i]); ^ user.c:25:1: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void) scanf("%ld", &m); ^ user.c:29:1: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void) scanf("%d %ld", &q, &x); ^