System Error
/in/foo.cc: In function 'void work()':
/in/foo.cc:65:12: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
if (!h[i])
^
VJ4Error('ProblemDataNotFoundError', '题目 590c9c2bd3d8a13210993b33 的数据未找到。', 'newbzoj', '590c9c2bd3d8a13210993b33')
