Compilare: user.c: In function ‘main’: user.c:10:46: warning: unused variable ‘ok2’ [-Wunused-variable] int i, j, k, t, n, sz[100000], minn, ok, ok2, x; ^ user.c:10:42: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int i, j, k, t, n, sz[100000], minn, ok, ok2, x; ^ user.c:8:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("minlcm.in", "r", stdin); ^ user.c:9:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("minlcm.out", "w", stdout); ^ user.c:11:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.c:13:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.c:15:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &sz[i]); ^ user.c: In function ‘lnko’: user.c:45:1: warning: control reaches end of non-void function [-Wreturn-type] } ^