#491874 (PyPy3) No.148 試験監督（3）

• 問題: No.148 試験監督（3）
• ユーザー: realDivineJK
• 提出日時: 2020-06-05 02:28:57
• 言語: PyPy3 (7.3.15)
• 結果: AC
• 実行時間: 106 ms / 1,000 ms
• コード長: 21,060 bytes
• コンパイル時間: 341 ms
• コンパイル使用メモリ: 82,244 KB
• 実行使用メモリ: 76,108 KB
• 最終ジャッジ日時: 2024-05-08 02:55:15
• 合計ジャッジ時間: 1,834 ms
• ジャッジサーバーID （参考情報）: judge3 / judge1

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	56 ms; 64,768 KB
testcase_01	AC	60 ms; 64,768 KB
testcase_02	AC	80 ms; 65,280 KB
testcase_03	AC	88 ms; 65,536 KB
testcase_04	AC	89 ms; 65,920 KB
testcase_05	AC	79 ms; 65,152 KB
testcase_06	AC	89 ms; 75,648 KB
testcase_07	AC	96 ms; 76,032 KB
testcase_08	AC	106 ms; 76,108 KB
testcase_09	AC	46 ms; 61,696 KB
testcase_10	AC	45 ms; 61,312 KB
testcase_11	AC	41 ms; 57,216 KB

ソースコード

fact = 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T = int(input())
mod = int(1e9) + 7
def inved(a):
    x, y, u, v, k, l = 1, 0, 0, 1, a, mod
    while l != 0:
        x, y, u, v = u, v, x - u * (k // l), y - v * (k // l)
        k, l = l, k % l
    return x % mod
peak = int(5e5)
def get_fact(n):
    pos = n // peak
    f = fact[pos]
    for j in range(n % peak):
        f *= (pos*peak+j+1)%mod
        f %= mod
    return f
    
for _ in range(T):
    C, P = input().split()
    m, n = len(P), len(C)
    if m >= 11 or n < m:
        print(0)
    else:
        P = int(P)
        if P >= mod:
            print(0)
        else:
            flg = False
            if n == m:
                if int(C) < int(P):
                    print(0)
                else:
                    flg = True
            else:
                flg = True
            if flg:
                t = 0
                for i in range(n):
                    t += int(C[i])
                    if i < n - 1:
                        t *= 10
                        t %= mod
                if ((t - P + 1) % mod < P):
                    print(0)
                else:
                    t += mod - P + 1
                    t %= mod
                    X = get_fact(t)
                    Y = get_fact(t - P)
                    print(X*inved(Y)%mod)