Compilare: user.cpp: In function ‘Trie* Recursion(int, std::vector<int>)’: user.cpp:67:15: warning: unused variable ‘root2’ [-Wunused-variable] Trie* root2 = Recursion(depth - 1, s[1]); ^ user.cpp: In function ‘int main()’: user.cpp:92:15: warning: unused variable ‘root’ [-Wunused-variable] Trie *root = Recursion(20, v); ^ user.cpp: In function ‘Trie* Recursion(int, std::vector<int>)’: user.cpp:77:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:81:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:87:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:89:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^