Compilare: user.cpp: In function ‘void dfs(int, Trie*)’: user.cpp:24:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ^ user.cpp:28:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->son[car]==0) ^ user.cpp:30:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] node->son[car]=new Trie; ^ user.cpp:32:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] node->son[car]->cnt=nodes; ^ user.cpp:34:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] dfs(v[x][i],node->son[car]); ^