class Combination:

    def __init__(self, MX=10**6, MOD=998244353):
        self.MX = MX
        self.MOD = MOD
        self.fact = [1] * (MX + 1)
        self.inv = [1] * (MX + 1)
        self.f_inv = [1] * (MX + 1)
        for i in range(2, MX + 1):
            self.fact[i] = (self.fact[i - 1] * i) % self.MOD
            self.inv[i] = ( - (self.MOD // i) * (self.inv[self.MOD % i])) % self.MOD
            self.f_inv[i] = (self.f_inv[i - 1] * self.inv[i]) % self.MOD
    
    def invs(self, n):
        if n <= self.MX:
            return self.inv[n]
        else:
            return pow(n, self.MOD - 2, self.MOD)
    
    def p(self, n, r):
        if r > n or r < 0:
            return 0
        return (self.fact[n] * self.f_inv[r]) % self.MOD
    
    def c(self, n, r):
        if r > n or r < 0:
            return 0
        return (self.fact[n] * self.f_inv[r] * self.f_inv[n - r]) % self.MOD

MOD = 998244353
com = Combination()

N, M, K = map(int, input().split())
X = input()

dp = [0] * (N + 1)
dp[N] = 1
for i in range(M):
    ndp = [0] * (N + 1)
    for j in range(K, N + 1):
        if X[i] == '0':
            for k in range(K, j + 1):
                ndp[k] += dp[j] * com.c(j, k) * pow(2, (M - i - 1) * (j - k), MOD)
                ndp[k] %= MOD
        else:
            for k in range(K):
                ndp[j] += dp[j] * com.c(j, k)
                ndp[j] %= MOD
    dp = ndp

ans = 0
for k in range(K, N + 1):
    ans += dp[k]
    ans %= MOD
print(ans)