結果
問題 | No.2980 Planar Tree 2 |
ユーザー | mkawa2 |
提出日時 | 2024-12-04 01:24:06 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 437 ms / 2,000 ms |
コード長 | 1,775 bytes |
コンパイル時間 | 498 ms |
コンパイル使用メモリ | 81,916 KB |
実行使用メモリ | 137,396 KB |
最終ジャッジ日時 | 2024-12-04 01:24:20 |
合計ジャッジ時間 | 10,172 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 | 425 ms
121,768 KB |
testcase_01 | AC | 386 ms
121,520 KB |
testcase_02 | AC | 381 ms
121,776 KB |
testcase_03 | AC | 58 ms
75,904 KB |
testcase_04 | AC | 69 ms
75,264 KB |
testcase_05 | AC | 410 ms
119,408 KB |
testcase_06 | AC | 405 ms
123,020 KB |
testcase_07 | AC | 414 ms
122,096 KB |
testcase_08 | AC | 413 ms
122,436 KB |
testcase_09 | AC | 374 ms
117,852 KB |
testcase_10 | AC | 435 ms
118,864 KB |
testcase_11 | AC | 396 ms
121,800 KB |
testcase_12 | AC | 383 ms
120,788 KB |
testcase_13 | AC | 437 ms
122,220 KB |
testcase_14 | AC | 388 ms
121,772 KB |
testcase_15 | AC | 199 ms
121,352 KB |
testcase_16 | AC | 71 ms
80,512 KB |
testcase_17 | AC | 66 ms
80,384 KB |
testcase_18 | AC | 64 ms
79,616 KB |
testcase_19 | AC | 66 ms
80,896 KB |
testcase_20 | AC | 68 ms
81,664 KB |
testcase_21 | AC | 65 ms
80,612 KB |
testcase_22 | AC | 69 ms
76,416 KB |
testcase_23 | AC | 60 ms
76,672 KB |
testcase_24 | AC | 65 ms
81,024 KB |
testcase_25 | AC | 55 ms
75,648 KB |
testcase_26 | AC | 386 ms
124,832 KB |
testcase_27 | AC | 372 ms
125,068 KB |
testcase_28 | AC | 410 ms
122,788 KB |
testcase_29 | AC | 215 ms
137,396 KB |
ソースコード
import sys # sys.setrecursionlimit(200005) # sys.set_int_max_str_digits(200005) int1 = lambda x: int(x)-1 pDB = lambda *x: print(*x, end="\n", file=sys.stderr) p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr) def II(): return int(sys.stdin.readline()) def LI(): return list(map(int, sys.stdin.readline().split())) def LLI(rows_number): return [LI() for _ in range(rows_number)] def LI1(): return list(map(int1, sys.stdin.readline().split())) def LLI1(rows_number): return [LI1() for _ in range(rows_number)] def SI(): return sys.stdin.readline().rstrip() dij = [(0, 1), (-1, 0), (0, -1), (1, 0)] # dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)] # inf = -1-(-1 << 31) inf = -1-(-1 << 62) # md = 10**9+7 md = 998244353 def nCr(com_n, com_r): if com_r < 0: return 0 if com_n < com_r: return 0 return fac[com_n]*ifac[com_r]%md*ifac[com_n-com_r]%md n_max = 200005 fac = [1] for i in range(1, n_max+1): fac.append(fac[-1]*i%md) ifac = [1]*(n_max+1) ifac[n_max] = pow(fac[n_max], md-2, md) for i in range(n_max-1, 1, -1): ifac[i] = ifac[i+1]*(i+1)%md n=II() to=[[] for _ in range(n)] for _ in range(n-1): u,v=LI1() to[u].append(v) to[v].append(u) def dfs(root=0): uu = [root] stack = [(v, root) for v in to[root]] while stack: u, p = stack.pop() if parent[u] != -1: continue uu.append(u) parent[u] = p depth[u] = depth[p]+1 for v in to[u]: if parent[v] != -1 or v == root: continue stack.append((v, u)) return uu parent, depth = [-1]*n, [0]*n uu=dfs() dp=[1]*n for u in uu[:0:-1]: dp[u]=dp[u]*fac[len(to[u])]%md p=parent[u] dp[p]*=dp[u] dp[p]%=md ans=dp[0]*fac[len(to[0])]%md*ifac[n-1]%md print(ans)