import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

def ssum(r, n):
    return r * (n - 1) * n // 2

mod = 998244353
m = int(input())
s = [int(x) for x in input()]

n = len(s)

lrui = [1] * (n + 1)
rrui = [1] * (n + 1)
F = 1
for i in range(n):
    if s[i] < m % 10:
        y =  m // 10 + 1
    else:
        y =  m // 10
    lrui[i+1] = lrui[i] * y % mod
for i in range(n-1, -1, -1):
    if s[i] < m % 10:
        y =  m // 10 + 1
    else:
        y =  m // 10
    rrui[i] = rrui[i+1] * y % mod


ans = 0
z = 1
for i in range(n-1, -1, -1):
    if s[i] < m % 10:
        y =  m // 10 + 1
    else:
        y =  m // 10
    # print(s[i], y, s[i] * y + ssum(10, y))
    ans += z * (s[i] * y + ssum(10, y)) % mod *lrui[i] % mod * rrui[i+1] % mod
    ans %= mod
    z *= m
    z %= mod

print(ans)