結果
問題 | No.2403 "Eight" Bridges of Königsberg |
ユーザー | cleantted |
提出日時 | 2023-08-04 22:42:48 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 928 ms / 2,000 ms |
コード長 | 3,613 bytes |
コンパイル時間 | 221 ms |
コンパイル使用メモリ | 82,560 KB |
実行使用メモリ | 161,024 KB |
最終ジャッジ日時 | 2024-05-05 01:27:24 |
合計ジャッジ時間 | 13,340 ms |
ジャッジサーバーID (参考情報) |
judge4 / 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 | 159 ms
91,008 KB |
testcase_01 | AC | 151 ms
90,880 KB |
testcase_02 | AC | 157 ms
91,008 KB |
testcase_03 | AC | 157 ms
91,136 KB |
testcase_04 | AC | 454 ms
119,040 KB |
testcase_05 | AC | 776 ms
149,376 KB |
testcase_06 | AC | 928 ms
156,928 KB |
testcase_07 | AC | 548 ms
125,696 KB |
testcase_08 | AC | 607 ms
137,088 KB |
testcase_09 | AC | 893 ms
161,024 KB |
testcase_10 | AC | 875 ms
156,928 KB |
testcase_11 | AC | 684 ms
142,720 KB |
testcase_12 | AC | 864 ms
160,640 KB |
testcase_13 | AC | 624 ms
136,192 KB |
testcase_14 | AC | 155 ms
90,880 KB |
testcase_15 | AC | 154 ms
91,136 KB |
testcase_16 | AC | 158 ms
91,008 KB |
testcase_17 | AC | 156 ms
91,008 KB |
testcase_18 | AC | 155 ms
91,264 KB |
testcase_19 | AC | 191 ms
109,824 KB |
testcase_20 | AC | 160 ms
92,160 KB |
testcase_21 | AC | 172 ms
97,792 KB |
testcase_22 | AC | 188 ms
108,800 KB |
testcase_23 | AC | 190 ms
108,672 KB |
testcase_24 | AC | 186 ms
106,112 KB |
testcase_25 | AC | 171 ms
96,384 KB |
testcase_26 | AC | 159 ms
91,008 KB |
testcase_27 | AC | 235 ms
122,240 KB |
testcase_28 | AC | 204 ms
104,320 KB |
testcase_29 | AC | 191 ms
97,536 KB |
testcase_30 | AC | 174 ms
95,616 KB |
testcase_31 | AC | 232 ms
122,880 KB |
testcase_32 | AC | 186 ms
93,696 KB |
testcase_33 | AC | 173 ms
96,512 KB |
testcase_34 | AC | 205 ms
96,000 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)) def f1(N, M, L): G = [set() for _ in range(N)] GR = [set() for _ in range(N)] for i, (u, v) in enumerate(L): 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 return sum(T) // 2 - 1 def f2(N, M, L): G = [set() for _ in range(N)] GR = [set() for _ in range(N)] for i, (u, v) in enumerate(L): G[u].add((v, i)) GR[v].add((u, i)) T = [0] * N F = [False] * M for i in reversed(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 return sum(T) // 2 - 1 def main(): N, M = read_values() L = [] for _ in range(M): u, v = read_index() L.append((u, v)) print(min(f1(N, M, L), f2(N, M, L))) if __name__ == "__main__": main()