/in/foo.cc: In function 'int main()':
/in/foo.cc:21:14: warning: unused variable 'u' [-Wunused-variable]
  for(int i=1,u,v;i<=m;i++) scanf("%d%d",&x,&y),out[x]++,in[y]++,addedge(x,y);
              ^
/in/foo.cc:21:16: warning: unused variable 'v' [-Wunused-variable]
  for(int i=1,u,v;i<=m;i++) scanf("%d%d",&x,&y),out[x]++,in[y]++,addedge(x,y);
                ^

VJ4Error('ProblemDataNotFoundError', '题目 590c9939d3d8a13210993a89 的数据未找到。', 'newbzoj', '590c9939d3d8a13210993a89')