結果

問題 No.1254 補強への架け橋
ユーザー marroncastlemarroncastle
提出日時 2020-10-10 00:48:15
言語 PyPy3
(7.3.15)
結果
WA  
実行時間 -
コード長 2,093 bytes
コンパイル時間 352 ms
コンパイル使用メモリ 82,304 KB
実行使用メモリ 308,424 KB
最終ジャッジ日時 2024-07-20 15:05:25
合計ジャッジ時間 32,662 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
このコードへのチャレンジ
(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 48 ms
60,544 KB
testcase_01 AC 53 ms
60,416 KB
testcase_02 AC 48 ms
60,416 KB
testcase_03 AC 49 ms
60,160 KB
testcase_04 AC 48 ms
60,672 KB
testcase_05 AC 48 ms
60,544 KB
testcase_06 AC 49 ms
60,544 KB
testcase_07 AC 50 ms
60,416 KB
testcase_08 AC 49 ms
60,416 KB
testcase_09 WA -
testcase_10 AC 48 ms
60,416 KB
testcase_11 AC 52 ms
60,544 KB
testcase_12 AC 49 ms
60,672 KB
testcase_13 AC 49 ms
61,056 KB
testcase_14 AC 50 ms
61,056 KB
testcase_15 AC 51 ms
60,800 KB
testcase_16 AC 49 ms
60,544 KB
testcase_17 AC 49 ms
60,288 KB
testcase_18 AC 48 ms
60,416 KB
testcase_19 AC 50 ms
60,800 KB
testcase_20 AC 50 ms
60,800 KB
testcase_21 AC 50 ms
60,544 KB
testcase_22 AC 48 ms
60,672 KB
testcase_23 AC 49 ms
60,544 KB
testcase_24 AC 51 ms
61,184 KB
testcase_25 WA -
testcase_26 AC 51 ms
60,928 KB
testcase_27 WA -
testcase_28 AC 49 ms
61,056 KB
testcase_29 AC 50 ms
60,544 KB
testcase_30 WA -
testcase_31 AC 50 ms
60,800 KB
testcase_32 AC 50 ms
60,800 KB
testcase_33 WA -
testcase_34 AC 54 ms
61,440 KB
testcase_35 WA -
testcase_36 AC 49 ms
60,800 KB
testcase_37 AC 51 ms
60,672 KB
testcase_38 AC 52 ms
60,544 KB
testcase_39 AC 54 ms
60,672 KB
testcase_40 AC 53 ms
61,184 KB
testcase_41 WA -
testcase_42 AC 53 ms
60,672 KB
testcase_43 AC 74 ms
71,424 KB
testcase_44 WA -
testcase_45 AC 61 ms
64,768 KB
testcase_46 WA -
testcase_47 AC 67 ms
68,608 KB
testcase_48 WA -
testcase_49 WA -
testcase_50 WA -
testcase_51 WA -
testcase_52 AC 71 ms
71,808 KB
testcase_53 AC 73 ms
72,588 KB
testcase_54 AC 78 ms
74,624 KB
testcase_55 AC 67 ms
70,436 KB
testcase_56 WA -
testcase_57 AC 62 ms
68,608 KB
testcase_58 AC 69 ms
69,632 KB
testcase_59 AC 53 ms
61,568 KB
testcase_60 AC 56 ms
64,896 KB
testcase_61 WA -
testcase_62 AC 51 ms
62,208 KB
testcase_63 WA -
testcase_64 AC 102 ms
78,020 KB
testcase_65 WA -
testcase_66 AC 107 ms
79,104 KB
testcase_67 WA -
testcase_68 AC 114 ms
78,904 KB
testcase_69 AC 116 ms
79,784 KB
testcase_70 AC 104 ms
78,720 KB
testcase_71 WA -
testcase_72 WA -
testcase_73 AC 99 ms
78,080 KB
testcase_74 AC 106 ms
78,924 KB
testcase_75 AC 109 ms
78,852 KB
testcase_76 WA -
testcase_77 AC 114 ms
78,376 KB
testcase_78 AC 115 ms
80,128 KB
testcase_79 AC 126 ms
80,256 KB
testcase_80 WA -
testcase_81 WA -
testcase_82 AC 121 ms
80,420 KB
testcase_83 WA -
testcase_84 WA -
testcase_85 AC 274 ms
103,784 KB
testcase_86 AC 414 ms
123,560 KB
testcase_87 AC 480 ms
150,008 KB
testcase_88 AC 132 ms
82,560 KB
testcase_89 AC 512 ms
151,188 KB
testcase_90 WA -
testcase_91 AC 263 ms
101,880 KB
testcase_92 WA -
testcase_93 WA -
testcase_94 WA -
testcase_95 WA -
testcase_96 AC 487 ms
142,804 KB
testcase_97 AC 233 ms
96,260 KB
testcase_98 WA -
testcase_99 AC 313 ms
111,828 KB
testcase_100 AC 536 ms
160,576 KB
testcase_101 AC 152 ms
84,872 KB
testcase_102 WA -
testcase_103 AC 171 ms
86,528 KB
testcase_104 WA -
testcase_105 WA -
testcase_106 AC 237 ms
97,640 KB
testcase_107 AC 523 ms
157,428 KB
testcase_108 AC 499 ms
144,416 KB
testcase_109 AC 343 ms
112,216 KB
testcase_110 AC 371 ms
119,560 KB
testcase_111 AC 361 ms
119,216 KB
testcase_112 AC 198 ms
91,332 KB
testcase_113 WA -
testcase_114 WA -
testcase_115 WA -
testcase_116 AC 285 ms
106,832 KB
testcase_117 WA -
testcase_118 WA -
testcase_119 AC 295 ms
107,244 KB
testcase_120 AC 477 ms
138,500 KB
testcase_121 WA -
testcase_122 WA -
testcase_123 AC 50 ms
60,800 KB
testcase_124 WA -
testcase_125 WA -
権限があれば一括ダウンロードができます

ソースコード

diff #

import sys,os,io
input = sys.stdin.readline
class Graph:
  def __init__(self, N):
    self.V = N
    self.edge = [[] for _ in range(self.V)]
    self.edges = [0]*(N*2+1)
    self.visited = [0]*N
    self.parent = [N]*N
  
  def add_edge(self, a, b, i):
    self.edge[a].append((b,i))
    self.edges[i] = (a,b)

  def dfs(self, start):
    stack = [start]
    self.parent[start] = -1
    self.visited[start] = 1
    #記録したい値の配列を定義
    while stack:
      v = stack[-1]
      for u,i in self.edge[v]:
        if u==self.parent[v]:
          continue
        if self.parent[u]==N: #子へ降ろす
          self.parent[u]=v
          stack.append(u)
          break
        else:
          return u
      else:
        stack.pop()

  def bfs1(self, start):
    stack = [start]
    self.parent[start] = -1
    while stack:
      v = stack.pop()
      for u,i in self.edge[v]:
        if u==self.parent[v]:
          continue
        if self.parent[u]!=N:
          return u
        self.parent[u]=v
        #頂点に対する処理
        stack.append(u)
    return
  
  
  def bfs(self, start):
    d = deque()
    d.append(dict())
    cyc = dict()
    cnt = 0
    while len(d)>0 and cnt<3*N:
      es = d.popleft()
      if len(es):
        v0,v = self.edges[list(es.keys())[-1]]
      else:
        v0,v = start,start
      for w,i in self.edge[v]:
        if w==v0:
          continue
        if w==start:
          dic = copy(es)
          dic[i] = True
          for i in range(N+1,2*N+1):
            if i in dic:
              dic[i-N] = True
              del dic[i]
          if len(dic)>len(cyc):
            cyc = dic
        if w not in es:
          dic = copy(es)
          dic[i] = True
          d.append(dic)
      cnt += 1
    return cyc

from collections import deque
from copy import copy

N = int(input())
G = Graph(N)
for i in range(N):
  a,b = map(int, input().split())
  G.add_edge(a-1,b-1,i+1)
  G.add_edge(b-1,a-1,N+i+1)

ans = set()
cyc = G.bfs1(0)
es = G.bfs(cyc)
for e in es.keys():
  ans.add(e)
ans = list(ans)
print(len(ans))
print(*ans)


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