Compilare: user.c: In function ‘main’: user.c:38:24: warning: unused variable ‘h’ [-Wunused-variable] long long res = INF, h; ^ user.c:16:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("calatorie.in", "r", stdin); ^ user.c:17:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("calatorie.out", "w", stdout); ^ user.c:18:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &t); ^ user.c:23:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &n); ^ user.c:25:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &nk[i], &hk[i]); ^