Compilare: user.cpp: In member function ‘void HN::print()’: user.cpp:80:28: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘LL {aka long long int}’ [-Wformat=] printf("%d", a[n-1]); ^ user.cpp:82:30: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘LL {aka long long int}’ [-Wformat=] printf("%d", a[i]); ^ user.cpp: In function ‘int main()’: user.cpp:93:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grazing.in", "r", stdin); ^ user.cpp:94:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grazing.out", "w", stdout); ^ user.cpp:96:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^