Accepted
/in/foo.cc: In function 'void dfs(int, int)': /in/foo.cc:9:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[p][k].size();i++)dfs(v[p][k][i],p); ~^~~~~~~~~~~~~~~
/in/foo.cc: In function 'void dfs(int, int)': /in/foo.cc:9:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[p][k].size();i++)dfs(v[p][k][i],p); ~^~~~~~~~~~~~~~~