#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#include <time.h>
#include <stack>
#include <array>
#include <list>
#include <atcoder/all>
#define popcount __builtin_popcount
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef pair<int, int> P;
using mint=modint998244353;
mint f[2000010], invf[2000010];
void fac(int n){
    f[0]=1;
    for(ll i=1; i<=n; i++) f[i]=f[i-1]*i;
    invf[n]=f[n].inv();
    for(ll i=n-1; i>=0; i--) invf[i]=invf[i+1]*(i+1);
}
mint comb(int x, int y){
    if(!(0<=y && y<=x)) return 0;
    return f[x]*invf[y]*invf[x-y];
}
int main()
{
    int n, m, k;
    cin>>n>>m>>k;
    fac(n+m);
    string x; cin>>x;
    bool ok[202][202]={};
    mint dp[202][202];
    auto solve=[&](auto solve, int i, int c)->mint{
        if(ok[i][c])return dp[i][c];
        ok[i][c]=1;
        if(i==m-1){
            mint s=0;
            for(int j=0; j<k && j<=c; j++){
                s+=comb(c, j);
            }
            if(x[i]=='0'){
                return dp[i][c]=mint(2).pow(c)-s;
            }else{
                return dp[i][c]=s;
            }
        }
        mint res=0;
        if(x[i]=='0'){
            for(int j=k; j<=c; j++){
                res+=solve(solve, i+1, j)*comb(c, j)*(mint(2).pow((m-1-i)*(c-j)));
            }
        }else{
            mint s=0;
            for(int j=0; j<k && j<=c; j++){
                s+=comb(c, j);
            }
            res+=s*solve(solve, i+1, c);
        }
        return dp[i][c]=res;
    };
    cout<<solve(solve, 0, n).val()<<endl;
    return 0;
}