Compilare: user.cpp: In function ‘int getChild(int, char)’: user.cpp:40:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < graph[nod].size(); ++j ) ^ user.cpp: In function ‘void addWord()’: user.cpp:70:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < s.size(); ++i ) ^ user.cpp: In function ‘int main()’: user.cpp:268:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < str.size(); ++i ) ^ user.cpp:276:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < word[snod].size(); ++j ) ^