Compilare: user.cpp: In function ‘int getChild(int, char)’: user.cpp:39:38: 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:69:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < s.size(); ++i ) ^ user.cpp: In function ‘void blue(int)’: user.cpp:120:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < graph[nod].size(); ++j ) ^ user.cpp: In function ‘void green(int)’: user.cpp:145:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < graph[nod].size(); ++j ) ^ user.cpp: In function ‘int main()’: user.cpp:180:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < str.size(); ++i ) ^