System Error
/in/foo.cc: In function 'int LCA(int, int)':
/in/foo.cc:54:9: warning: self-comparison always evaluates to false [-Wtautological-compare]
if(d[a]>d[a]) swap(a,b);
~~~~^~~~~
VJ4Error('ProblemDataNotFoundError', '题目 590c9c35d3d8a13210993b62 的数据未找到。', 'newbzoj', '590c9c35d3d8a13210993b62')
