Compilare: user.cpp: In function ‘void dfs(trie*)’: user.cpp:50:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < nod -> v.size(); i ++ ) ^ user.cpp: In function ‘int main()’: user.cpp:103:22: warning: suggest parentheses around comparison in operand of ‘!=’ [-Wparentheses] for(int i = 0; i < A[i] != 0; i ++) ^