Compilare: user.c: In function ‘merge’: user.c:21:17: warning: ‘return’ with no value, in function returning non-void [enabled by default] if (i == j) return; ^ user.c: In function ‘main’: user.c:40:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("arhipelag.in", "r", stdin); ^ user.c:41:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("arhipelag.out", "w", stdout); ^ user.c:44:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i", &t); ^ user.c:48:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i%i", &n, &m, &k); ^ user.c:58:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i", &x, &y); ^ user.c:69:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i", &Order[i]); ^