結果
問題 | No.1685 One by One |
ユーザー | 👑 hitonanode |
提出日時 | 2021-08-14 02:30:26 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 979 ms / 3,000 ms |
コード長 | 2,282 bytes |
コンパイル時間 | 433 ms |
コンパイル使用メモリ | 87,124 KB |
実行使用メモリ | 203,752 KB |
最終ジャッジ日時 | 2023-09-12 06:22:19 |
合計ジャッジ時間 | 19,755 ms |
ジャッジサーバーID (参考情報) |
judge11 / judge13 |
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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 | 75 ms
71,312 KB |
testcase_01 | AC | 74 ms
71,332 KB |
testcase_02 | AC | 105 ms
77,204 KB |
testcase_03 | AC | 213 ms
91,328 KB |
testcase_04 | AC | 137 ms
82,732 KB |
testcase_05 | AC | 550 ms
138,264 KB |
testcase_06 | AC | 317 ms
114,024 KB |
testcase_07 | AC | 397 ms
115,564 KB |
testcase_08 | AC | 103 ms
76,884 KB |
testcase_09 | AC | 132 ms
81,256 KB |
testcase_10 | AC | 735 ms
181,140 KB |
testcase_11 | AC | 139 ms
79,944 KB |
testcase_12 | AC | 109 ms
77,148 KB |
testcase_13 | AC | 458 ms
121,180 KB |
testcase_14 | AC | 167 ms
86,324 KB |
testcase_15 | AC | 720 ms
163,448 KB |
testcase_16 | AC | 127 ms
81,868 KB |
testcase_17 | AC | 121 ms
80,720 KB |
testcase_18 | AC | 130 ms
81,488 KB |
testcase_19 | AC | 93 ms
76,144 KB |
testcase_20 | AC | 192 ms
77,424 KB |
testcase_21 | AC | 206 ms
78,108 KB |
testcase_22 | AC | 227 ms
83,448 KB |
testcase_23 | AC | 252 ms
84,508 KB |
testcase_24 | AC | 736 ms
182,996 KB |
testcase_25 | AC | 913 ms
193,900 KB |
testcase_26 | AC | 783 ms
191,280 KB |
testcase_27 | AC | 860 ms
186,044 KB |
testcase_28 | AC | 855 ms
203,388 KB |
testcase_29 | AC | 979 ms
203,612 KB |
testcase_30 | AC | 872 ms
203,688 KB |
testcase_31 | AC | 964 ms
203,500 KB |
testcase_32 | AC | 959 ms
203,752 KB |
testcase_33 | AC | 969 ms
203,700 KB |
testcase_34 | AC | 89 ms
76,148 KB |
testcase_35 | AC | 90 ms
76,304 KB |
testcase_36 | AC | 88 ms
76,624 KB |
testcase_37 | AC | 87 ms
76,412 KB |
testcase_38 | AC | 202 ms
76,912 KB |
testcase_39 | AC | 194 ms
76,968 KB |
testcase_40 | AC | 216 ms
78,080 KB |
testcase_41 | AC | 218 ms
78,532 KB |
testcase_42 | AC | 74 ms
71,200 KB |
testcase_43 | AC | 74 ms
71,552 KB |
testcase_44 | AC | 75 ms
71,272 KB |
testcase_45 | AC | 74 ms
71,336 KB |
testcase_46 | AC | 337 ms
113,860 KB |
testcase_47 | AC | 331 ms
113,760 KB |
testcase_48 | AC | 334 ms
113,652 KB |
testcase_49 | AC | 331 ms
113,768 KB |
ソースコード
import itertools N, M = map(int, input().split()) class facmod: def __init__(self, N: int, md: int) -> None: assert N < md self.md = md self.facs = [1] * (N + 1) self.facinvs = [1] * (N + 1) for i in range(1, N + 1): self.facs[i] = self.facs[i - 1] * i % md self.facinvs[N] = pow(self.facs[i], md - 2, md) for i in range(N - 1, 0, -1): self.facinvs[i] = self.facinvs[i + 1] * (i + 1) % md def nCr(self, n: int, r: int) -> int: if n < 0 or r < 0 or n < r: return 0 return (self.facs[n] * self.facinvs[r]) % md * self.facinvs[n - r] % md md = 1000000007 fac = facmod(N + M, md) precalc = [[0] * (M + 1) for _ in range(N + 1)] precalc[0][0] = 1 for n in range(N + 1): for m in range(M + 1): if n + m - 1 >= 0: precalc[n][m] = fac.nCr(n + m - 1, n - 1) if m >= 2: precalc[n][m] += precalc[n][m - 2] if precalc[n][m] >= md: precalc[n][m] -= md ret = 0 if N % 2 == 0: half = (N - 1) // 2 for nnonzero in range(half * 2 + 1): coeff = 0 for npos in range(half + 1): if nnonzero - npos < 0 or nnonzero - npos > half: continue coeff += fac.nCr(N - 1, npos) * fac.nCr(N - 1 - npos, nnonzero - npos) coeff %= md tmp = 0 for b0 in range(M + 1): if M - nnonzero - b0 < 0: break tmp += precalc[nnonzero][M - nnonzero - b0] * (2 - (b0 == 0)) ret += tmp % md * coeff ret %= md else: for npos in range(N // 2 + 1): for nneg in range(N // 2 + 1): nnonzero = npos + nneg coeff = 0 if M - (npos + nneg) >= 0: coeff += precalc[nnonzero][M - nnonzero] m = M - npos - (N - nneg) if m >= 0: coeff += precalc[nnonzero][m] * 2 m = M - (N - nnonzero) - (npos if npos > nneg else nneg) * 2 if m >= 0: coeff += md - precalc[nnonzero][m] ret += fac.nCr(N, nnonzero) * fac.nCr(nnonzero, npos) % md * (coeff % md) ret %= md print(ret)