結果
問題 | No.1856 Mex Sum 2 |
ユーザー | Mitarushi |
提出日時 | 2022-02-24 23:31:28 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 1,352 ms / 3,000 ms |
コード長 | 2,041 bytes |
コンパイル時間 | 211 ms |
コンパイル使用メモリ | 82,048 KB |
実行使用メモリ | 77,500 KB |
最終ジャッジ日時 | 2024-07-02 14:16:10 |
合計ジャッジ時間 | 40,264 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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 | 41 ms
52,480 KB |
testcase_01 | AC | 41 ms
52,480 KB |
testcase_02 | AC | 85 ms
76,032 KB |
testcase_03 | AC | 41 ms
52,352 KB |
testcase_04 | AC | 62 ms
64,896 KB |
testcase_05 | AC | 63 ms
65,920 KB |
testcase_06 | AC | 63 ms
65,152 KB |
testcase_07 | AC | 78 ms
71,424 KB |
testcase_08 | AC | 42 ms
52,096 KB |
testcase_09 | AC | 60 ms
63,488 KB |
testcase_10 | AC | 62 ms
64,768 KB |
testcase_11 | AC | 63 ms
64,896 KB |
testcase_12 | AC | 49 ms
59,392 KB |
testcase_13 | AC | 41 ms
51,968 KB |
testcase_14 | AC | 41 ms
52,224 KB |
testcase_15 | AC | 42 ms
52,224 KB |
testcase_16 | AC | 63 ms
65,024 KB |
testcase_17 | AC | 85 ms
75,904 KB |
testcase_18 | AC | 80 ms
74,112 KB |
testcase_19 | AC | 65 ms
65,792 KB |
testcase_20 | AC | 65 ms
65,408 KB |
testcase_21 | AC | 43 ms
53,248 KB |
testcase_22 | AC | 86 ms
76,032 KB |
testcase_23 | AC | 44 ms
52,864 KB |
testcase_24 | AC | 76 ms
70,784 KB |
testcase_25 | AC | 85 ms
76,160 KB |
testcase_26 | AC | 41 ms
52,480 KB |
testcase_27 | AC | 41 ms
51,968 KB |
testcase_28 | AC | 44 ms
53,248 KB |
testcase_29 | AC | 400 ms
76,856 KB |
testcase_30 | AC | 264 ms
76,976 KB |
testcase_31 | AC | 383 ms
77,104 KB |
testcase_32 | AC | 540 ms
76,856 KB |
testcase_33 | AC | 560 ms
77,108 KB |
testcase_34 | AC | 388 ms
76,724 KB |
testcase_35 | AC | 282 ms
76,720 KB |
testcase_36 | AC | 180 ms
77,236 KB |
testcase_37 | AC | 382 ms
76,856 KB |
testcase_38 | AC | 158 ms
76,984 KB |
testcase_39 | AC | 110 ms
76,848 KB |
testcase_40 | AC | 115 ms
76,472 KB |
testcase_41 | AC | 113 ms
76,600 KB |
testcase_42 | AC | 1,290 ms
76,860 KB |
testcase_43 | AC | 1,161 ms
76,972 KB |
testcase_44 | AC | 1,214 ms
76,892 KB |
testcase_45 | AC | 1,275 ms
76,852 KB |
testcase_46 | AC | 1,168 ms
76,852 KB |
testcase_47 | AC | 1,228 ms
76,852 KB |
testcase_48 | AC | 1,311 ms
76,980 KB |
testcase_49 | AC | 1,293 ms
77,116 KB |
testcase_50 | AC | 1,070 ms
77,484 KB |
testcase_51 | AC | 1,352 ms
76,984 KB |
testcase_52 | AC | 1,312 ms
76,984 KB |
testcase_53 | AC | 1,325 ms
76,992 KB |
testcase_54 | AC | 1,322 ms
77,496 KB |
testcase_55 | AC | 1,327 ms
77,116 KB |
testcase_56 | AC | 1,323 ms
76,984 KB |
testcase_57 | AC | 1,319 ms
77,496 KB |
testcase_58 | AC | 1,324 ms
76,856 KB |
testcase_59 | AC | 1,321 ms
76,860 KB |
testcase_60 | AC | 1,330 ms
77,244 KB |
testcase_61 | AC | 1,322 ms
77,100 KB |
testcase_62 | AC | 1,330 ms
77,120 KB |
testcase_63 | AC | 1,320 ms
77,500 KB |
testcase_64 | AC | 1,321 ms
77,244 KB |
testcase_65 | AC | 1,322 ms
77,368 KB |
testcase_66 | AC | 1,325 ms
76,856 KB |
ソースコード
def fft_inplace(a, w): n = len(a) m = n t = 1 while m >= 2: mh = m >> 1 for i in range(0, n, m): for s in range(mh): j, k = i+s, i+mh+s a[j], u = a[j]+a[k], a[j]-a[k] a[k] = u * w[s*t] % 998244353 m = mh t *= 2 def ifft_inplace(a, w): n = len(a) m = 2 t = -(n >> 1) while m <= n: mh = m >> 1 for i in range(0, n, m): for s in range(mh): j, k = i+s, i+mh+s u = a[k] * w[s*t] % 998244353 a[j], a[k] = a[j]+u, a[j]-u m <<= 1 t //= 2 n_inv = pow(n, 998244353-2, 998244353) for i in range(n): a[i] = a[i] * n_inv % 998244353 n, m = map(int, input().split()) assert 1 <= n <= 2000 assert 1 <= m <= 10 ** 9 fixed_n = 1 << ((n+1)*2).bit_length() w_root = pow(3, (998244353-1)//fixed_n, 998244353) w = [1] * fixed_n for i in range(1, fixed_n): w[i] = w[i-1] * w_root % 998244353 frac = [1] * (n + 1) for i in range(1, n+1): frac[i] = frac[i-1] * i % 998244353 frac_inv = [0] * (n+1) frac_inv[n] = pow(frac[n], 998244353-2, 998244353) for i in range(1, n+1)[::-1]: frac_inv[i-1] = frac_inv[i] * i % 998244353 dp1 = [0] * fixed_n dp1[0] = 1 t = [0] * fixed_n for i in range(n+1): t[i] = (pow(2, i, 998244353)-1) * pow(pow(2, i, 998244353) * frac[i], 998244353-2, 998244353) % 998244353 fft_inplace(t, w) ans_sub = [0] * (n+1) for k in range(min(n, m+1)): fft_inplace(dp1, w) for i, j in enumerate(t): dp1[i] = dp1[i] * j % 998244353 ifft_inplace(dp1, w) pow_tmp = 1 for i in range(k+1, n+1)[::-1]: ans_sub[i] += dp1[i] * pow_tmp % 998244353 pow_tmp = pow_tmp * (m - k) % 998244353 for i in range(n+1, fixed_n): dp1[i] = 0 ans = sum(ans_sub[i] % 998244353 * frac_inv[n-i] for i in range(n+1)) % 998244353 ans = ans * pow(2, n, 998244353) * frac[n] % 998244353 print(ans) try: x = input() assert x == "" except EOFError: pass