/in/foo.cc:27:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() { 
      ^

VJ4Error('ProblemDataNotFoundError', '题目 590c9c5dd3d8a13210993c13 的数据未找到。', 'newbzoj', '590c9c5dd3d8a13210993c13')