結果
問題 | No.2674 k-Walk on Bipartite |
ユーザー | hato336 |
提出日時 | 2024-03-15 22:54:01 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 646 ms / 2,000 ms |
コード長 | 2,865 bytes |
コンパイル時間 | 244 ms |
コンパイル使用メモリ | 82,336 KB |
実行使用メモリ | 111,464 KB |
最終ジャッジ日時 | 2024-09-30 02:26:08 |
合計ジャッジ時間 | 12,535 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 | 143 ms
88,876 KB |
testcase_01 | AC | 140 ms
88,852 KB |
testcase_02 | AC | 141 ms
88,660 KB |
testcase_03 | AC | 139 ms
89,076 KB |
testcase_04 | AC | 138 ms
88,920 KB |
testcase_05 | AC | 139 ms
89,128 KB |
testcase_06 | AC | 138 ms
88,592 KB |
testcase_07 | AC | 452 ms
109,976 KB |
testcase_08 | AC | 538 ms
105,472 KB |
testcase_09 | AC | 369 ms
106,532 KB |
testcase_10 | AC | 632 ms
109,432 KB |
testcase_11 | AC | 467 ms
103,004 KB |
testcase_12 | AC | 590 ms
106,368 KB |
testcase_13 | AC | 371 ms
104,192 KB |
testcase_14 | AC | 195 ms
99,620 KB |
testcase_15 | AC | 646 ms
110,848 KB |
testcase_16 | AC | 513 ms
111,464 KB |
testcase_17 | AC | 519 ms
105,092 KB |
testcase_18 | AC | 287 ms
98,784 KB |
testcase_19 | AC | 450 ms
105,800 KB |
testcase_20 | AC | 377 ms
108,160 KB |
testcase_21 | AC | 532 ms
106,584 KB |
testcase_22 | AC | 540 ms
110,632 KB |
testcase_23 | AC | 138 ms
88,724 KB |
testcase_24 | AC | 140 ms
88,648 KB |
testcase_25 | AC | 140 ms
88,896 KB |
testcase_26 | AC | 140 ms
88,828 KB |
testcase_27 | AC | 141 ms
88,876 KB |
testcase_28 | AC | 141 ms
88,904 KB |
testcase_29 | AC | 138 ms
88,764 KB |
testcase_30 | AC | 139 ms
88,764 KB |
testcase_31 | AC | 139 ms
88,732 KB |
testcase_32 | AC | 142 ms
88,712 KB |
testcase_33 | AC | 140 ms
89,088 KB |
testcase_34 | AC | 141 ms
88,628 KB |
testcase_35 | AC | 140 ms
88,960 KB |
testcase_36 | AC | 144 ms
89,140 KB |
testcase_37 | AC | 145 ms
89,024 KB |
testcase_38 | AC | 149 ms
88,692 KB |
ソースコード
import collections,sys,math,functools,operator,itertools,bisect,heapq,decimal,string,time,random #sys.setrecursionlimit(10**9) #sys.set_int_max_str_digits(0) class UnionFind(): def __init__(self, n): self.n = n self.parents = [-1] * n def find(self, x): if self.parents[x] < 0: return x else: self.parents[x] = self.find(self.parents[x]) return self.parents[x] def union(self, x, y): 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 def size(self, x): return -self.parents[self.find(x)] def same(self, x, y): return self.find(x) == self.find(y) def members(self, x): root = self.find(x) return [i for i in range(self.n) if self.find(i) == root] def roots(self): return [i for i, x in enumerate(self.parents) if x < 0] def group_count(self): return len(self.roots()) def all_group_members(self): group_members = collections.defaultdict(list) for member in range(self.n): group_members[self.find(member)].append(member) return group_members def __str__(self): return ''.join(f'{r}: {m}' for r, m in self.all_group_members().items()) input = sys.stdin.readline n,m = map(int,input().split()) s,t,k = map(int,input().split()) if n == 1: if k == 0: print('Yes') else: print('No') exit() if n == 2: if s != t and k % 2 == 0: print('No') exit() if s == t and k % 2 == 1: print('No') exit() uf = UnionFind(n) edge = [[] for i in range(n)] for i in range(m): u,v = map(int,input().split()) u-=1 v-=1 edge[u].append(v) edge[v].append(u) uf.union(u,v) s -= 1 t -= 1 if s == t: if len(edge[s]) >= 1 and k % 2 == 0: print('Yes') exit() elif len(edge[s]) == 0 and k % 2 == 0: print('Unknown') exit() elif k % 2 == 1: print('No') exit() if uf.same(s,t) == False: print('Unknown') exit() start = s d = collections.deque() dist = [10**18 for i in range(n)] color = [0 for i in range(n)] d.append(start) dist[start] = 0 while d: now = d.popleft() for i in edge[now]: color[i] = color[now] ^ 1 if dist[i] > dist[now] + 1: dist[i] = dist[now] + 1 d.append(i) if color[s] == color[t]: if k % 2 == 0 and dist[t] <= k: print('Yes') exit() if k % 2 != 0: print('No') exit() if color[s] != color[t]: if k % 2 == 1 and dist[t] <= k: print('Yes') exit() if k % 2 != 1: print('No') exit() print('Unknown')