import math

MOD = 10**9 + 7

def main():
    N = int(input().strip())
    c = list(map(int, input().split()))
    
    # Check if all digits are the same
    non_zero = [i for i in range(9) if c[i] > 0]
    if len(non_zero) == 1:
        idx = non_zero[0]
        if c[idx] == N:
            d = idx + 1
            pow_10 = pow(10, N, 9 * MOD)
            numerator = (pow_10 - 1) % (9 * MOD)
            term = (numerator // 9) % MOD
            ans = (d * term) % MOD
            print(ans)
            return
    
    # Case 2: Not all digits are the same
    all_even = True
    for i in range(9):
        if c[i] > 0 and (i + 1) % 2 != 0:
            all_even = False
            break
    
    S = sum((i + 1) * c[i] for i in range(9))
    g = math.gcd(S, 9)
    factor = 2 if all_even else 1
    ans = (factor * g) % MOD
    print(ans)

if __name__ == "__main__":
    main()