/in/foo.cc: In function 'void dfs1(int, int, int)':
/in/foo.cc:19:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0;i<e[x].size();i++)
                  ~^~~~~~~~~~~~
/in/foo.cc: In function 'void dfs2(int, int, int)':
/in/foo.cc:37:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0;i<e[x].size();i++)
                  ~^~~~~~~~~~~~
/in/foo.cc: In function 'void test()':
/in/foo.cc:138:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for (int i=1;i<=n;i++) printf("%d ",b[i]);printf("\n");
     ^~~
/in/foo.cc:138:47: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     for (int i=1;i<=n;i++) printf("%d ",b[i]);printf("\n");
                                               ^~~~~~

VJ4Error('ProblemDataNotFoundError', '题目 590c987dd3d8a13210993742 的数据未找到。', 'newbzoj', '590c987dd3d8a13210993742')