結果
問題 | No.386 貪欲な領主 |
ユーザー | rlangevin |
提出日時 | 2023-10-03 00:01:29 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 660 ms / 2,000 ms |
コード長 | 2,353 bytes |
コンパイル時間 | 193 ms |
コンパイル使用メモリ | 82,108 KB |
実行使用メモリ | 116,184 KB |
最終ジャッジ日時 | 2024-07-26 13:57:03 |
合計ジャッジ時間 | 5,752 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
(要ログイン)
テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 42 ms
53,300 KB |
testcase_01 | AC | 38 ms
53,484 KB |
testcase_02 | AC | 39 ms
53,212 KB |
testcase_03 | AC | 40 ms
54,044 KB |
testcase_04 | AC | 656 ms
113,396 KB |
testcase_05 | AC | 641 ms
116,184 KB |
testcase_06 | AC | 655 ms
116,040 KB |
testcase_07 | AC | 80 ms
76,364 KB |
testcase_08 | AC | 154 ms
80,568 KB |
testcase_09 | AC | 93 ms
77,528 KB |
testcase_10 | AC | 40 ms
52,472 KB |
testcase_11 | AC | 40 ms
53,812 KB |
testcase_12 | AC | 80 ms
76,484 KB |
testcase_13 | AC | 115 ms
77,672 KB |
testcase_14 | AC | 660 ms
115,668 KB |
testcase_15 | AC | 578 ms
113,596 KB |
ソースコード
import sys input = sys.stdin.readline class LowestCommonAncestor: def __init__(self, n): self._n = n self._logn = 0 v = 1 while v <= self._n: v *= 2 self._logn += 1 self._depth = [0] * self._n self._distance = [0] * self._n self._ancestor = [[-1] * self._n for _ in range(self._logn)] self._G = [[] for i in range(self._n)] def add_edge(self, u, v, w=1): self._G[u].append((v, w)) self._G[v].append((u, w)) def build(self, root=0): stack = [root] self._distance[root] = U[root] while stack: cur = stack.pop() for nex, _ in self._G[cur]: if self._ancestor[0][nex] != cur and self._ancestor[0][cur] != nex: self._ancestor[0][nex] = cur self._depth[nex] = self._depth[cur] + 1 self._distance[nex] = self._distance[cur] + U[nex] stack.append(nex) for k in range(1, self._logn): for i in range(self._n): if self._ancestor[k - 1][i] == -1: self._ancestor[k][i] = -1 else: self._ancestor[k][i] = self._ancestor[k - 1][self._ancestor[k - 1][i]] def lca(self, u, v): if self._depth[u] > self._depth[v]: u, v = v, u for k in range(self._logn - 1, -1, -1): if ((self._depth[v] - self._depth[u]) >> k) & 1: v = self._ancestor[k][v] if u == v: return u for k in range(self._logn - 1, -1, -1): if self._ancestor[k][u] != self._ancestor[k][v]: u = self._ancestor[k][u] v = self._ancestor[k][v] return self._ancestor[0][u] def distance(self, u, v): return self._distance[u] + self._distance[v] - 2 * self._distance[self.lca(u, v)] + U[self.lca(u, v)] N = int(input()) G = LowestCommonAncestor(N) for i in range(N - 1): u, v = map(int, input().split()) G.add_edge(u, v) G.add_edge(v, u) U = [0] * N for i in range(N): U[i] = int(input()) G.build(0) M = int(input()) ans = 0 for _ in range(M): A, B, C = map(int, input().split()) ans += C * G.distance(A, B) print(ans)