Compilare: user.cpp: In function ‘void EulerianPath(int)’: user.cpp:19:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph[x].size();++i) ^ user.cpp:25:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<graph[ind].size();++j) ^ user.cpp: In function ‘int main()’: user.cpp:53:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size()-1;++i) ^