結果
問題 | No.2403 "Eight" Bridges of Königsberg |
ユーザー | cleantted |
提出日時 | 2023-08-04 22:25:31 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,686 bytes |
コンパイル時間 | 170 ms |
コンパイル使用メモリ | 82,304 KB |
実行使用メモリ | 137,812 KB |
最終ジャッジ日時 | 2024-10-14 20:25:04 |
合計ジャッジ時間 | 14,113 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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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 | 173 ms
91,136 KB |
testcase_01 | WA | - |
testcase_02 | AC | 174 ms
90,752 KB |
testcase_03 | AC | 174 ms
91,008 KB |
testcase_04 | AC | 458 ms
111,312 KB |
testcase_05 | WA | - |
testcase_06 | AC | 861 ms
133,304 KB |
testcase_07 | AC | 552 ms
116,684 KB |
testcase_08 | AC | 645 ms
120,704 KB |
testcase_09 | AC | 901 ms
136,448 KB |
testcase_10 | AC | 829 ms
137,728 KB |
testcase_11 | AC | 720 ms
123,904 KB |
testcase_12 | AC | 888 ms
137,812 KB |
testcase_13 | AC | 661 ms
120,448 KB |
testcase_14 | AC | 178 ms
91,044 KB |
testcase_15 | AC | 173 ms
90,880 KB |
testcase_16 | AC | 174 ms
90,624 KB |
testcase_17 | AC | 172 ms
91,020 KB |
testcase_18 | AC | 178 ms
90,880 KB |
testcase_19 | AC | 209 ms
105,936 KB |
testcase_20 | AC | 180 ms
91,488 KB |
testcase_21 | AC | 179 ms
92,416 KB |
testcase_22 | AC | 204 ms
105,276 KB |
testcase_23 | AC | 207 ms
104,888 KB |
testcase_24 | AC | 208 ms
103,784 KB |
testcase_25 | AC | 189 ms
93,696 KB |
testcase_26 | AC | 177 ms
90,992 KB |
testcase_27 | AC | 224 ms
106,240 KB |
testcase_28 | AC | 223 ms
104,832 KB |
testcase_29 | AC | 209 ms
96,384 KB |
testcase_30 | AC | 186 ms
92,416 KB |
testcase_31 | AC | 223 ms
106,368 KB |
testcase_32 | AC | 202 ms
93,696 KB |
testcase_33 | AC | 188 ms
92,032 KB |
testcase_34 | AC | 211 ms
95,616 KB |
ソースコード
# import bisect import copy import heapq import itertools import math import operator import random import sys from bisect import bisect, bisect_left, bisect_right, insort from collections import Counter, deque from fractions import Fraction from functools import cmp_to_key, lru_cache, partial from inspect import currentframe from math import ceil, gcd, log10, pi, sqrt from typing import Iterable, Iterator, List, Tuple, TypeVar, Union # import pypyjit # pypyjit.set_param('max_unroll_recursion=-1') # import string # import networkx as nx input = sys.stdin.readline sys.setrecursionlimit(10000000) # mod = 10 ** 9 + 7 mod = 998244353 # mod = 1 << 128 # mod = 10 ** 30 + 1 INF = 1 << 61 DIFF = 10 ** -9 DX = [1, 0, -1, 0, 1, 1, -1, -1] DY = [0, 1, 0, -1, 1, -1, 1, -1] def read_values(): return tuple(map(int, input().split())) def read_index(): return tuple(map(lambda x: int(x) - 1, input().split())) def read_list(): return list(read_values()) def read_lists(N): return [read_list() for _ in range(N)] def dprint(*values): print(*values, file=sys.stderr) def dprint2(*values): names = {id(v): k for k, v in currentframe().f_back.f_locals.items()} dprint(", ".join(f"{names.get(id(value), '???')}={repr(value)}" for value in values)) # https://tjkendev.github.io/procon-library/python/graph/scc.html # 強連結成分分解(SCC): グラフGに対するSCCを行う # 入力: <N>: 頂点サイズ, <G>: 順方向の有向グラフ, <RG>: 逆方向の有向グラフ # 出力: (<ラベル数>, <各頂点のラベル番号>) def scc(N, G, RG): order = [] used = [0]*N group = [None]*N def dfs(s): used[s] = 1 for t in G[s]: if not used[t]: dfs(t) order.append(s) def rdfs(s, col): group[s] = col used[s] = 1 for t in RG[s]: if not used[t]: rdfs(t, col) for i in range(N): if not used[i]: dfs(i) used = [0]*N label = 0 for s in reversed(order): if not used[s]: rdfs(s, label) label += 1 return label, group # 縮約後のグラフを構築 def construct(N, G, label, group): G0 = [set() for i in range(label)] GP = [[] for i in range(label)] for v in range(N): lbs = group[v] for w in G[v]: lbt = group[w] if lbs == lbt: continue G0[lbs].add(lbt) GP[lbs].append(v) return G0, GP def main(): N, M = read_values() L = [] G = [set() for _ in range(N)] GR = [set() for _ in range(N)] for i in range(M): u, v = read_index() L.append((u, v)) G[u].add((v, i)) GR[v].add((u, i)) T = [0] * N F = [False] * M for i in range(M): if F[i]: continue F[i] = True u0, v0 = L[i] G[u0].discard((v0, i)) GR[v0].discard((u0, i)) u = v0 while True: for v, k in G[u]: if F[k]: continue F[k] = True break else: break G[u].discard((v, k)) GR[v].discard((u, k)) u = v u1 = u v = u0 while True: for u, k in GR[v]: if F[k]: continue F[k] = True break else: break GR[v].discard((u, k)) G[u].discard((v, k)) v = u v1 = v T[u1] += 1 T[v1] += 1 print(sum(T) // 2 - 1) if __name__ == "__main__": main()