import typing from math import factorial import numpy as np import sys class ModFactorial: def __call__( self, n: int = 1 << 20, ) -> np.array: a = np.arange(n); a[0] = 1 return self.cumprod(a) def cumprod( self, a: np.array, ) -> np.array: m = self.__mod l = len(a) n = int(np.sqrt(l) + 1) a = np.resize(a, (n, n)) for i in range(n-1): a[:, i + 1] *= a[:, i] a[:, i + 1] %= m for i in range(n-1): a[i + 1] *= a[i, -1] a[i + 1] %= m return np.ravel(a)[:l] def __init__( self, modulo: int, ) -> typing.NoReturn: self.__mod = modulo def inv( self, n: int = 1 << 20, ) -> np.array: a = np.arange(1, n + 1) m = self.__mod x = int(self(n)[-1]) a[-1] = pow(x, m - 2, m) return self.cumprod( a[::-1], )[n::-1] class Inverse(): def __call__( self, i: int, ) -> int: return self[i] def __getitem__( self, i: int, ) -> int: return self.__a[i] def __init__( self, n: int, modulo: int, ) -> typing.NoReturn: m = modulo fn = ModFactorial(m) a = fn.inv(n) a[1:] *= fn(n - 1) self.__a = a % m def main() -> typing.NoReturn: mod = 10 ** 9 + 7 fn = ModFactorial(mod) fact = fn(1 << 18) ifact = fn.inv(1 << 18) inv = Inverse(1 << 18, mod) n = int(input()) c = np.array( sys.stdin.readline() .split(), dtype=np.int64, ) m = fact[n] for x in c: m *= ifact[x] m %= mod s = (np.arange(9) + 1) * c s = s.sum() s *= inv[n] s %= mod d = 0 for _ in range(n): d *= 10 d += 1 d %= mod s = s * d % mod * m % mod print(s) print(fact) print(ifact) print(inv) main()