結果
問題 | No.1094 木登り / Climbing tree |
ユーザー | McGregorsh |
提出日時 | 2023-07-12 23:51:59 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,288 bytes |
コンパイル時間 | 540 ms |
コンパイル使用メモリ | 81,920 KB |
実行使用メモリ | 447,928 KB |
最終ジャッジ日時 | 2024-09-14 12:37:07 |
合計ジャッジ時間 | 28,054 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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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 | 154 ms
88,448 KB |
testcase_01 | WA | - |
testcase_02 | AC | 1,116 ms
447,928 KB |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | AC | 943 ms
155,648 KB |
testcase_16 | AC | 1,533 ms
359,004 KB |
testcase_17 | AC | 1,174 ms
247,168 KB |
testcase_18 | AC | 1,219 ms
203,008 KB |
testcase_19 | AC | 1,323 ms
301,992 KB |
testcase_20 | WA | - |
testcase_21 | AC | 1,259 ms
265,792 KB |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
ソースコード
import sys from sys import stdin from fractions import Fraction import math from math import ceil, floor, sqrt, pi, factorial, gcd from copy import deepcopy from collections import Counter, deque, defaultdict from heapq import heapify, heappop, heappush from itertools import accumulate, product, combinations, combinations_with_replacement, permutations from bisect import bisect, bisect_left, bisect_right from functools import reduce, lru_cache from decimal import Decimal, getcontext, ROUND_HALF_UP def i_input(): return int(stdin.readline()) def i_map(): return map(int, stdin.readline().split()) def i_list(): return list(i_map()) def s_input(): return stdin.readline()[:-1] def s_map(): return s_input().split() def s_list(): return list(s_map()) def lcm(a, b): return a * b // gcd(a, b) def get_distance(x1, y1, x2, y2): d = sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2) return d def rotate(table): n_fild = [] for x in zip(*table[::-1]): n_fild.append(x) return n_fild sys.setrecursionlimit(10 ** 7) INF = float('inf') MOD = 10 ** 9 + 7 MOD2 = 998244353 alpa = 'abcdefghijklmnopqrstuvwxyz' ALPA = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' N = int(input()) nums = [[] for i in range(N)] cou = [0] * N for i in range(N-1): a, b, c = i_map() a -= 1 b -= 1 cou[b] += 1 nums[a].append([b, c]) start = 0 for i in range(N): if cou[i] == 0: start = i break costs = [INF] * N costs[start] = 0 G = [[] for i in range(N)] que = deque() que.append(start) while que: p = que.popleft() for nxt, cost in nums[p]: costs[nxt] = cost + costs[p] G[p].append(nxt) que.append(nxt) # Euler Tour の構築 def EuletTour(N, G, start): # 注意!! #G[v]: 頂点Vの子頂点(親頂点は含まない) #start 根。基本は0だが問題によりそれ以外になる。 def dfs(v, d): F[v] = len(S) depth[v] = d S.append(v) for w in G[v]: dfs(w, d+1) S.append(v) S = [] F = [0]*N depth = [0]*N dfs(start, 0) return S, F, depth S, F, depth = EuletTour(N, G, start) # 存在しない範囲は深さが他よりも大きくなるようにする INF = (N, None) # LCAを計算するクエリの前計算 M = 2*N M0 = 2**(M-1).bit_length() data = [INF]*(2*M0) for i, v in enumerate(S): data[M0-1+i] = (depth[v], i) for i in range(M0-2, -1, -1): data[i] = min(data[2*i+1], data[2*i+2]) # LCAの計算 (generatorで最小値を求める) def _query(a, b): yield INF a += M0; b += M0 while a < b: if b & 1: b -= 1 yield data[b-1] if a & 1: yield data[a-1] a += 1 a >>= 1; b >>= 1 # LCAの計算 (外から呼び出す関数) def query(u, v): fu = F[u]; fv = F[v] if fu > fv: fu, fv = fv, fu return S[min(_query(fu, fv+1))[1]] Q = int(input()) for i in range(Q): a, b = i_map() a -= 1 b -= 1 flag = query(a, b) if flag != a and flag != b: c1 = costs[a] - costs[flag] c2 = costs[b] - costs[flag] print(c1 + c2) else: if flag == a: print(costs[b] - costs[a]) else: print(costs[a] - costs[b]) #def main(): #if __name__ == '__main__': # main()