摘要: Then n - 1n−1 lines follow. ii-th line contains two integers f_{a_i}(1 \le f_{a_i} < i)fai​​(1≤fai​​<i), w_i(0 \le w_i \le 10^{18})wi​(0≤wi​≤1018) —Th 阅读全文
posted @ 2019-05-29 18:56 茄子Min 阅读(686) 评论(0) 推荐(0) 编辑