Compilare: user.cpp: In function ‘bool bfs(int)’: user.cpp:33:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<grr[s].size();i++) ^ user.cpp: In function ‘void dfss(int)’: user.cpp:57:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<grr[s].size();i++) ^ user.cpp: In function ‘void dfsd(int)’: user.cpp:65:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<grr[s].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:90:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<grr[n].size();i++) ^ user.cpp:116:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mu.size();i++) ^ user.cpp:121:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size();i++) ^