結果
問題 | No.1481 Rotation ABC |
ユーザー | tamato |
提出日時 | 2021-04-16 22:05:59 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 77 ms / 2,000 ms |
コード長 | 1,541 bytes |
コンパイル時間 | 253 ms |
コンパイル使用メモリ | 82,432 KB |
実行使用メモリ | 77,824 KB |
最終ジャッジ日時 | 2024-07-03 01:53:47 |
合計ジャッジ時間 | 3,854 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 | 52 ms
60,544 KB |
testcase_01 | AC | 51 ms
60,800 KB |
testcase_02 | AC | 51 ms
61,056 KB |
testcase_03 | AC | 52 ms
60,800 KB |
testcase_04 | AC | 52 ms
60,288 KB |
testcase_05 | AC | 51 ms
60,928 KB |
testcase_06 | AC | 51 ms
60,800 KB |
testcase_07 | AC | 51 ms
60,800 KB |
testcase_08 | AC | 52 ms
60,800 KB |
testcase_09 | AC | 51 ms
60,672 KB |
testcase_10 | AC | 52 ms
60,672 KB |
testcase_11 | AC | 53 ms
60,672 KB |
testcase_12 | AC | 52 ms
60,800 KB |
testcase_13 | AC | 52 ms
61,184 KB |
testcase_14 | AC | 51 ms
60,800 KB |
testcase_15 | AC | 51 ms
61,056 KB |
testcase_16 | AC | 52 ms
61,184 KB |
testcase_17 | AC | 51 ms
61,312 KB |
testcase_18 | AC | 52 ms
61,184 KB |
testcase_19 | AC | 52 ms
60,928 KB |
testcase_20 | AC | 52 ms
61,312 KB |
testcase_21 | AC | 52 ms
61,312 KB |
testcase_22 | AC | 52 ms
60,928 KB |
testcase_23 | AC | 53 ms
61,440 KB |
testcase_24 | AC | 52 ms
61,312 KB |
testcase_25 | AC | 52 ms
61,440 KB |
testcase_26 | AC | 52 ms
61,312 KB |
testcase_27 | AC | 52 ms
61,312 KB |
testcase_28 | AC | 64 ms
72,192 KB |
testcase_29 | AC | 63 ms
72,448 KB |
testcase_30 | AC | 64 ms
72,320 KB |
testcase_31 | AC | 76 ms
77,824 KB |
testcase_32 | AC | 77 ms
77,824 KB |
testcase_33 | AC | 76 ms
77,568 KB |
testcase_34 | AC | 76 ms
77,440 KB |
testcase_35 | AC | 71 ms
75,520 KB |
testcase_36 | AC | 75 ms
77,440 KB |
testcase_37 | AC | 75 ms
77,824 KB |
testcase_38 | AC | 74 ms
77,824 KB |
testcase_39 | AC | 69 ms
75,136 KB |
testcase_40 | AC | 76 ms
77,696 KB |
ソースコード
mod = 998244353 eps = 10**-9 def main(): import sys input = sys.stdin.readline # comb init nmax = 10 ** 5 + 10 # change here fac = [0] * nmax finv = [0] * nmax inv = [0] * nmax fac[0] = 1 fac[1] = 1 finv[0] = 1 finv[1] = 1 inv[1] = 1 for i in range(2, nmax): fac[i] = fac[i - 1] * i % mod inv[i] = mod - inv[mod % i] * (mod // i) % mod finv[i] = finv[i - 1] * inv[i] % mod def comb(n, r): if n < r: return 0 else: return (fac[n] * ((finv[r] * finv[n - r]) % mod)) % mod N = int(input()) S = input().rstrip('\n') ok = 0 # ABC flg = 0 for s in S: if flg == 0 and s == "A": flg = 1 elif flg == 1 and s == "B": flg = 2 elif flg == 2 and s == "C": ok = 1 break # BCA flg = 0 for s in S: if flg == 0 and s == "B": flg = 1 elif flg == 1 and s == "C": flg = 2 elif flg == 2 and s == "A": ok = 1 break # CAB flg = 0 for s in S: if flg == 0 and s == "C": flg = 1 elif flg == 1 and s == "A": flg = 2 elif flg == 2 and s == "B": ok = 1 break if not ok: print(1) exit() a = S.count("A") b = S.count("B") c = N - a - b ans = (comb(N, a) * comb(N-a, b) - a - b - c)%mod print(ans) if __name__ == '__main__': main()