結果

問題 No.1640 簡単な色塗り
ユーザー harurunharurun
提出日時 2021-06-17 13:52:43
言語 Python3
(3.12.2 + numpy 1.26.4 + scipy 1.12.0)
結果
AC  
実行時間 1,090 ms / 2,000 ms
コード長 2,754 bytes
コンパイル時間 488 ms
コンパイル使用メモリ 11,296 KB
実行使用メモリ 58,060 KB
最終ジャッジ日時 2023-09-12 01:35:47
合計ジャッジ時間 26,839 ms
ジャッジサーバーID
(参考情報)
judge12 / judge15
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 19 ms
8,880 KB
testcase_01 AC 20 ms
8,916 KB
testcase_02 AC 19 ms
9,044 KB
testcase_03 AC 19 ms
9,028 KB
testcase_04 AC 406 ms
53,648 KB
testcase_05 AC 510 ms
58,048 KB
testcase_06 AC 20 ms
8,868 KB
testcase_07 AC 20 ms
8,960 KB
testcase_08 AC 20 ms
8,912 KB
testcase_09 AC 19 ms
9,040 KB
testcase_10 AC 515 ms
37,904 KB
testcase_11 AC 410 ms
32,864 KB
testcase_12 AC 312 ms
29,764 KB
testcase_13 AC 856 ms
53,184 KB
testcase_14 AC 902 ms
52,552 KB
testcase_15 AC 240 ms
24,192 KB
testcase_16 AC 293 ms
27,432 KB
testcase_17 AC 724 ms
45,984 KB
testcase_18 AC 55 ms
12,124 KB
testcase_19 AC 344 ms
30,016 KB
testcase_20 AC 524 ms
36,964 KB
testcase_21 AC 422 ms
31,872 KB
testcase_22 AC 42 ms
11,056 KB
testcase_23 AC 526 ms
39,088 KB
testcase_24 AC 114 ms
17,256 KB
testcase_25 AC 328 ms
30,224 KB
testcase_26 AC 616 ms
42,484 KB
testcase_27 AC 211 ms
23,372 KB
testcase_28 AC 790 ms
50,772 KB
testcase_29 AC 554 ms
42,744 KB
testcase_30 AC 86 ms
16,068 KB
testcase_31 AC 967 ms
56,940 KB
testcase_32 AC 807 ms
50,868 KB
testcase_33 AC 476 ms
38,052 KB
testcase_34 AC 487 ms
44,500 KB
testcase_35 AC 307 ms
37,604 KB
testcase_36 AC 75 ms
16,332 KB
testcase_37 AC 92 ms
18,672 KB
testcase_38 AC 609 ms
52,940 KB
testcase_39 AC 240 ms
27,736 KB
testcase_40 AC 213 ms
27,816 KB
testcase_41 AC 586 ms
45,876 KB
testcase_42 AC 317 ms
30,848 KB
testcase_43 AC 247 ms
31,524 KB
testcase_44 AC 348 ms
31,032 KB
testcase_45 AC 168 ms
25,680 KB
testcase_46 AC 85 ms
16,932 KB
testcase_47 AC 66 ms
13,952 KB
testcase_48 AC 564 ms
53,920 KB
testcase_49 AC 38 ms
11,072 KB
testcase_50 AC 19 ms
8,948 KB
testcase_51 AC 20 ms
8,876 KB
testcase_52 AC 1,090 ms
58,044 KB
testcase_53 AC 1,075 ms
58,060 KB
07_evil_01.txt RE -
07_evil_02.txt RE -
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 #

#行数assert
class dsu:
  def __init__(self,n):
    assert n>0,"n must be Natural"
    self.n=n
    self.parents=[-1]*n
    return
  
  def find(self,x):
    assert x<self.n,"warning!! this is 0 index"
    if self.parents[x]<0:
      return x
    self.parents[x]=self.find(self.parents[x])
    return self.parents[x]
  
  def merge(self,x,y):
    assert x<self.n and y<self.n,"warning!! this is 0 index"
    x=self.find(x)
    y=self.find(y)
    if x==y:
      return
    if self.parents[x]>self.parents[y]:
      x,y=y,x
    self.parents[x]+=self.parents[y]
    self.parents[y]=x
    return
    
  def size(self,x):
    assert x<self.n,"warning!! this is 0 index"
    return -self.parents[self.find(x)]
    
  def same(self,x,y):
    assert x<self.n and y<self.n,"warning!! this is 0 index"
    return self.find(x)==self.find(y)
  
  def leader(self,x):
    assert x<self.n,"warning!! this is 0 index"
    if self.parents[x]<0:
      return x
    self.parents[x]=self.leader(self.parents[x])
    return self.parents[x]
  
  def groups(self):
    ld=[self.leader(i) for i in range(self.n)]
    res=[[] for _ in range(self.n)]
    for i in range(self.n):
      res[ld[i]].append(i)
    return list(filter(lambda a:a !=[],res))

from sys import stdin
pin=stdin.readline
from collections import deque
def main():
  N=int(pin())
  assert(1<=N<=10**5)
  uf=dsu(N)
  to=[[]for _ in[0]*N]
  for i in range(N):
    A,B=map(int,pin().split())
    assert(1<=A<=N)
    assert(1<=B<=N)
    uf.merge(A-1,B-1)
    to[A-1].append([B-1,i])
    if A!=B:
      to[B-1].append([A-1,i])
  seen=[0]*N
  ans=[-1]*N
  
  gr=uf.groups()
  for linked in gr:
    is_cycle=True
    root=-1
    cycle_cnt=0
    
    for point in linked:
      link_size=len(to[point])
      for k in range(link_size):
        if to[point][k][0]==point:
          cycle_cnt+=1
          is_cycle=False
          ans[to[point][k][1]]=point+1
          root=point
    
    if cycle_cnt>1:
      print("No")
      return
    
    if is_cycle:
      next_point=-1
      que=deque()
      que.append([linked[0],-1])
      
      while que:
        q=que.pop()
        for j in to[q[0]]:
          if j[1]==q[1]:
            continue
          if seen[j[0]]:
            root=j[0]
            next_point=q[0]
            ans[j[1]]=root+1
            que.clear()
            break
          que.append([j[0],j[1]])
        seen[q[0]]=1
      
      if next_point==-1:
        print("No")
        return
      
    dq=deque()
    dq.append(root)

    while dq:
      q=dq.pop()

      for j in to[q]:
        if ans[j[1]]==-1:
          ans[j[1]]=j[0]+1
          dq.append(j[0])
  
  for i in ans:
    if i==-1:
      print("No")
      return
  
  print("Yes")
  for i in ans:
    print(i)
  return

main()
0