Compilare: user.cpp: In function ‘std::pair<T*, T*> split(T*, int)’: user.cpp:59:23: warning: control reaches end of non-void function [-Wreturn-type] return tmp; } } ^ user.cpp: In function ‘T* kth(T*, int)’: user.cpp:65:54: warning: control reaches end of non-void function [-Wreturn-type] if(nod->st->siz > pos) return kth(nod->st, pos); } ^ user.cpp: In function ‘int main()’: user.cpp:91:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rev.in", "r", stdin); ^ user.cpp:92:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rev.out", "w", stdout); ^ user.cpp:97:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &q); ^ user.cpp:104:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &k); ^