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Problem 1004
求样例解释
TearsFreeze
| 2016-09-24 19:46:26
Author
(0~2,0~2) 9种情况加起来也就只有 36 吧 算不出 43
TearsFreeze
| 2016-09-24 19:49:13
# 1
晕…… S(a,b)=1 个鬼啊 存在一个子树就 S(a,b)+=1 吧
philipsweng
| 2016-09-24 19:50:16
# 2
同感
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