Compilare: user.cpp: In function ‘int FindMinEdge(Trie*, int, int)’: user.cpp:32:13: warning: unused variable ‘y’ [-Wunused-variable] int y = 9; ^ user.cpp: In function ‘Trie* Recursion(int, std::vector<int>)’: user.cpp:70:15: warning: unused variable ‘root2’ [-Wunused-variable] Trie* root2 = Recursion(depth - 1, s[1]); ^ user.cpp:80:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:83:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:89:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:91:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^