Compilare: user.cpp: In function ‘void ins(Trie*, int)’: user.cpp:23:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ind=poz;ind<s.size();ind++) ^ user.cpp: In function ‘int main()’: user.cpp:49:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s.size();j++) ^ user.cpp:57:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s.size();j++) ^