結果
問題 | No.2202 贅沢てりたまチキン |
ユーザー | Shirotsume |
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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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 | 43 ms
53,632 KB |
testcase_01 | AC | 43 ms
54,400 KB |
testcase_02 | AC | 47 ms
54,400 KB |
testcase_03 | AC | 43 ms
54,016 KB |
testcase_04 | AC | 42 ms
54,268 KB |
testcase_05 | AC | 43 ms
54,400 KB |
testcase_06 | AC | 43 ms
54,144 KB |
testcase_07 | AC | 43 ms
53,632 KB |
testcase_08 | AC | 44 ms
53,760 KB |
testcase_09 | AC | 43 ms
54,528 KB |
testcase_10 | AC | 53 ms
64,896 KB |
testcase_11 | AC | 43 ms
53,632 KB |
testcase_12 | AC | 43 ms
54,528 KB |
testcase_13 | AC | 45 ms
54,272 KB |
testcase_14 | AC | 127 ms
79,616 KB |
testcase_15 | AC | 127 ms
79,872 KB |
testcase_16 | AC | 118 ms
79,264 KB |
testcase_17 | AC | 134 ms
79,488 KB |
testcase_18 | AC | 95 ms
78,320 KB |
testcase_19 | AC | 102 ms
79,232 KB |
testcase_20 | AC | 151 ms
79,856 KB |
testcase_21 | AC | 150 ms
79,872 KB |
testcase_22 | AC | 119 ms
76,384 KB |
testcase_23 | AC | 229 ms
77,664 KB |
testcase_24 | AC | 175 ms
77,312 KB |
testcase_25 | AC | 470 ms
82,140 KB |
testcase_26 | AC | 129 ms
80,000 KB |
testcase_27 | AC | 125 ms
79,744 KB |
ソースコード
class dsu(): n=1 parent_or_size=[-1 for i in range(n)] def __init__(self,N): self.n=N self.num = N self.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 x self.num -= 1 if (-self.parent_or_size[x]<-self.parent_or_size[y]): x,y=y,x self.parent_or_size[x]+=self.parent_or_size[y] self.parent_or_size[y]=x return x def 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 a self.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]]+=1 result=[[] 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 result2 def count(self): return self.num import sys from collections import deque, Counter input = lambda: sys.stdin.readline().rstrip() ii = lambda: int(input()) mi = lambda: map(int, input().split()) li = lambda: list(mi()) inf = 2 ** 63 - 1 mod = 998244353 n, m = mi() U = dsu(n + n) for _ in range(m): u, v = mi() u -= 1; v -= 1 U.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)