Compilare: user.cpp: In function ‘void Treap::init()’: user.cpp:31:22: warning: converting to non-pointer type ‘int’ from NULL [-Wconversion-null] T::NIL->size = NULL; // :( ^ user.cpp:35:22: warning: converting to non-pointer type ‘int’ from NULL [-Wconversion-null] T::NIL->p = NULL; // :( ^ user.cpp: In function ‘int main()’: user.cpp:146:21: warning: format ‘%d’ expects a matching ‘int*’ argument [-Wformat=] scanf("%d%d ",&n); ^ user.cpp:144:12: warning: unused variable ‘m’ [-Wunused-variable] int n, m; ^ user.cpp: In function ‘Treap::T* Treap::kth(Treap::T*, int)’: user.cpp:78:5: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:140:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv8.in", "r", stdin); ^ user.cpp:141:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv8.out", "w", stdout); ^ user.cpp:146:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ",&n); ^ user.cpp:152:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c ",&op); ^ user.cpp:156:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&a); ^ user.cpp:161:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ",&a,&b); ^ user.cpp:166:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ",&a,&b); ^ user.cpp:171:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ",&a,&b); ^