結果
問題 | No.2202 贅沢てりたまチキン |
ユーザー |
|
提出日時 | 2023-02-03 23:08:42 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 470 ms / 2,000 ms |
コード長 | 2,205 bytes |
コンパイル時間 | 192 ms |
コンパイル使用メモリ | 81,520 KB |
実行使用メモリ | 82,140 KB |
最終ジャッジ日時 | 2024-07-02 21:13:05 |
合計ジャッジ時間 | 4,533 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 28 |
ソースコード
class dsu():n=1parent_or_size=[-1 for i in range(n)]def __init__(self,N):self.n=Nself.num = Nself.parent_or_size=[-1 for i in range(N)]def merge(self,a,b):assert 0<=a<self.n, "0<=a<n,a={0},n={1}".format(a,self.n)assert 0<=b<self.n, "0<=b<n,b={0},n={1}".format(b,self.n)x=self.leader(a)y=self.leader(b)if x==y:return xself.num -= 1if (-self.parent_or_size[x]<-self.parent_or_size[y]):x,y=y,xself.parent_or_size[x]+=self.parent_or_size[y]self.parent_or_size[y]=xreturn xdef same(self,a,b):assert 0<=a<self.n, "0<=a<n,a={0},n={1}".format(a,self.n)assert 0<=b<self.n, "0<=b<n,b={0},n={1}".format(b,self.n)return self.leader(a)==self.leader(b)def leader(self,a):assert 0<=a<self.n, "0<=a<n,a={0},n={1}".format(a,self.n)if (self.parent_or_size[a]<0):return aself.parent_or_size[a]=self.leader(self.parent_or_size[a])return self.parent_or_size[a]def size(self,a):assert 0<=a<self.n, "0<=a<n,a={0},n={1}".format(a,self.n)return -self.parent_or_size[self.leader(a)]def groups(self):leader_buf=[0 for i in range(self.n)]group_size=[0 for i in range(self.n)]for i in range(self.n):leader_buf[i]=self.leader(i)group_size[leader_buf[i]]+=1result=[[] for i in range(self.n)]for i in range(self.n):result[leader_buf[i]].append(i)result2=[]for i in range(self.n):if len(result[i])>0:result2.append(result[i])return result2def count(self):return self.numimport sysfrom collections import deque, Counterinput = lambda: sys.stdin.readline().rstrip()ii = lambda: int(input())mi = lambda: map(int, input().split())li = lambda: list(mi())inf = 2 ** 63 - 1mod = 998244353n, m = mi()U = dsu(n + n)for _ in range(m):u, v = mi()u -= 1; v -= 1U.merge(u, v + n)U.merge(u + n, v)ans = 'Yes'for i in range(n):if not U.same(i, i + n):ans = 'No'print(ans)