Compilare: user.c: In function ‘search’: user.c:19:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, l, k; ^ user.c: In function ‘main’: user.c:53:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("imunitate.in", "r", stdin); ^ user.c:54:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("imunitate.out", "w", stdout); ^ user.c:57:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i", &t); ^ user.c:61:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i", &n, &m); ^ user.c:73:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i", &x, &y); ^