Compilare: user.cpp: In function ‘bool dfs(int)’: user.cpp:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(er.size() == m+1) ^ user.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < graf[cnod].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:82:14: warning: unused variable ‘wtf’ [-Wunused-variable] bool wtf = dfs(1); ^ user.cpp: In function ‘bool dfs(int)’: user.cpp:62:1: warning: control reaches end of non-void function [-Wreturn-type] } ^