Compilare: user.cpp: In constructor ‘treap::treap(int, int, treap*, treap*)’: user.cpp:11:13: warning: unused variable ‘ll’ [-Wunused-variable] int ll,rr; ^ user.cpp:11:16: warning: unused variable ‘rr’ [-Wunused-variable] int ll,rr; ^ user.cpp: In function ‘int main()’: user.cpp:96:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("order.in","r",stdin); ^ user.cpp:97:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("order.out","w",stdout); ^ user.cpp:99:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^