Compilare: user.cpp: In function ‘void Erase(int, int)’: user.cpp:21:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<graph[ind].size();++j) ^ user.cpp: In function ‘void EulerianPath(int)’: user.cpp:35:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph[x].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:72:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();++i) ^