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 01:03:58
言語 PyPy3
(7.3.15)
結果
WA  
実行時間 -
コード長 2,076 bytes
コンパイル時間 377 ms
コンパイル使用メモリ 82,048 KB
実行使用メモリ 280,192 KB
最終ジャッジ日時 2024-07-20 15:10:25
合計ジャッジ時間 26,713 ms
ジャッジサーバーID
(参考情報)
judge3 / judge4
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 47 ms
65,664 KB
testcase_01 WA -
testcase_02 AC 49 ms
60,288 KB
testcase_03 AC 49 ms
60,416 KB
testcase_04 AC 49 ms
60,800 KB
testcase_05 AC 53 ms
60,672 KB
testcase_06 AC 49 ms
60,160 KB
testcase_07 AC 49 ms
60,416 KB
testcase_08 WA -
testcase_09 WA -
testcase_10 AC 50 ms
60,544 KB
testcase_11 WA -
testcase_12 AC 52 ms
60,544 KB
testcase_13 WA -
testcase_14 AC 48 ms
60,800 KB
testcase_15 AC 48 ms
60,416 KB
testcase_16 AC 50 ms
60,928 KB
testcase_17 AC 49 ms
60,288 KB
testcase_18 AC 47 ms
60,288 KB
testcase_19 AC 48 ms
60,544 KB
testcase_20 AC 49 ms
60,928 KB
testcase_21 AC 48 ms
60,728 KB
testcase_22 AC 49 ms
60,672 KB
testcase_23 AC 48 ms
60,672 KB
testcase_24 AC 50 ms
61,056 KB
testcase_25 AC 48 ms
60,672 KB
testcase_26 WA -
testcase_27 AC 49 ms
60,416 KB
testcase_28 AC 48 ms
61,056 KB
testcase_29 WA -
testcase_30 AC 49 ms
60,544 KB
testcase_31 AC 50 ms
61,056 KB
testcase_32 WA -
testcase_33 WA -
testcase_34 WA -
testcase_35 AC 49 ms
60,800 KB
testcase_36 WA -
testcase_37 AC 49 ms
60,800 KB
testcase_38 AC 49 ms
60,416 KB
testcase_39 WA -
testcase_40 AC 50 ms
60,728 KB
testcase_41 AC 50 ms
60,672 KB
testcase_42 AC 50 ms
60,544 KB
testcase_43 WA -
testcase_44 AC 52 ms
62,592 KB
testcase_45 AC 55 ms
63,232 KB
testcase_46 WA -
testcase_47 AC 56 ms
64,000 KB
testcase_48 AC 62 ms
67,072 KB
testcase_49 WA -
testcase_50 WA -
testcase_51 WA -
testcase_52 AC 65 ms
69,248 KB
testcase_53 WA -
testcase_54 AC 68 ms
69,760 KB
testcase_55 WA -
testcase_56 WA -
testcase_57 WA -
testcase_58 AC 60 ms
65,920 KB
testcase_59 AC 51 ms
60,544 KB
testcase_60 WA -
testcase_61 AC 67 ms
68,736 KB
testcase_62 AC 51 ms
61,184 KB
testcase_63 WA -
testcase_64 AC 99 ms
77,952 KB
testcase_65 AC 106 ms
78,740 KB
testcase_66 WA -
testcase_67 WA -
testcase_68 AC 108 ms
79,232 KB
testcase_69 AC 114 ms
78,948 KB
testcase_70 AC 106 ms
78,208 KB
testcase_71 AC 97 ms
78,336 KB
testcase_72 WA -
testcase_73 WA -
testcase_74 AC 103 ms
79,104 KB
testcase_75 AC 106 ms
78,976 KB
testcase_76 WA -
testcase_77 WA -
testcase_78 WA -
testcase_79 AC 114 ms
79,100 KB
testcase_80 WA -
testcase_81 AC 110 ms
79,232 KB
testcase_82 AC 115 ms
79,148 KB
testcase_83 AC 392 ms
117,672 KB
testcase_84 WA -
testcase_85 WA -
testcase_86 AC 314 ms
107,292 KB
testcase_87 WA -
testcase_88 AC 126 ms
81,536 KB
testcase_89 WA -
testcase_90 WA -
testcase_91 WA -
testcase_92 WA -
testcase_93 WA -
testcase_94 AC 265 ms
103,972 KB
testcase_95 WA -
testcase_96 AC 345 ms
116,696 KB
testcase_97 WA -
testcase_98 WA -
testcase_99 WA -
testcase_100 WA -
testcase_101 AC 134 ms
84,224 KB
testcase_102 AC 120 ms
81,212 KB
testcase_103 AC 145 ms
85,152 KB
testcase_104 AC 162 ms
88,360 KB
testcase_105 AC 316 ms
108,292 KB
testcase_106 AC 197 ms
92,220 KB
testcase_107 AC 370 ms
116,820 KB
testcase_108 AC 385 ms
116,432 KB
testcase_109 WA -
testcase_110 AC 279 ms
103,884 KB
testcase_111 AC 285 ms
104,900 KB
testcase_112 AC 174 ms
87,632 KB
testcase_113 WA -
testcase_114 AC 193 ms
92,088 KB
testcase_115 AC 128 ms
82,112 KB
testcase_116 WA -
testcase_117 AC 166 ms
88,236 KB
testcase_118 AC 318 ms
113,176 KB
testcase_119 AC 245 ms
97,908 KB
testcase_120 AC 349 ms
115,152 KB
testcase_121 AC 150 ms
86,160 KB
testcase_122 AC 223 ms
93,692 KB
testcase_123 AC 50 ms
60,416 KB
testcase_124 TLE -
testcase_125 -- -
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<N+1:
      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 i not in es:
          dic = copy(es)
          dic[i] = True
          if w==start:
            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
          else:
            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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