Compilare: user.cpp: In function ‘int BFScount(int)’: user.cpp:92:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[current].size(); i++) ^ user.cpp: In function ‘void euler(int, int)’: user.cpp:116:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {if(lvl>=sol.size()) sol.push_back(current); ^ user.cpp:119:6: warning: unused variable ‘S’ [-Wunused-variable] int S=G[current].size(); ^