#include <fstream>
#include <cstring>

using namespace std ;
const int Base = 10;
const int Nmax = 105;
int N ,A ,B;

class Huge
{
    public: int V[45];
    Huge ()
    {
        memset(V, 0, sizeof(V));
    }
    Huge (int X)
    {
        *this = X;
    }
    Huge operator= (int X)
    {
        memset(V, 0, sizeof(V));
        for(; X; X /= Base)
            V[++V[0]] = X % Base;
        return *this;
    }
    Huge operator= (Huge X)
    {
        memcpy(V, X.V, sizeof(X.V));
        return *this;
    }

    Huge operator+ (Huge X) const
    {
        int i, T = 0;
        Huge Now;
        for(i = 1; i <= V[0] || i <= X.V[0] || T; i++, T /= Base)
            Now.V[i] = (T += V[i] + X.V[i]) % Base;
        Now.V[0] = i - 1;
        return Now;
    }
    int  operator== ( Huge X) const
    {
        int i,n = V[0],m = X.V[0];
        if(n < m)
            return -1;
        if(m > n)
            return 1;
        for(i = n; i && V[i] == X.V[i]; --i);
        if(i==0)
            return 0;
        if(V[i] < X.V[i])
            return -1;
        return 1;
    }
    void Print() const
    {
        for(int i = V[0]; i >= 1; i--) printf("%d", V[i]);
        printf("\n");
    }
    inline void ToHugeNumber(char *s)
    {
        V[0] = 0;
        for(int i = strlen(s)-1;i >= 0; --i)
            V[++V[0]] = s[i]-'0';
    }
    inline void sub(const Huge B)
    {
          int i, t = 0;
          for (i = 1; i <= V[0]; i++)
          {
                  V[i] -= ((i <= B.V[0]) ? B.V[i] : 0) + t;
                  V[i] += (t = V[i] < 0) * Base;
          }
          for (; V[0] > 1 && !V[V[0]]; V[0]--);
    }
};
Huge dp[Nmax][2][Nmax], a , sol;
int main()
{
    char s[Nmax];
    int i, j;
    ifstream f("pavare2.in");
    freopen("pavare2.out","w",stdout);
    f >> N >> A >> B >> (s+1);
    f.close();
    a.ToHugeNumber(s+1);
    dp[N][0][1] = dp[N][1][1] = 1;
    for(i = N-1;i ;--i)
    {
        for(j = 2;j <= A; ++j)
        {
            dp[i][0][j] = dp[i+1][0][j-1];
            dp[i][1][1] = dp[i][1][1] + dp[i+1][0][j-1];
        }
        dp[i][1][1] = dp[i][1][1] + dp[i+1][0][A];
        for(j = 2;j <= B; ++j)
        {
            dp[i][1][j] = dp[i+1][1][j-1];
            dp[i][0][1] = dp[i][0][1] + dp[i+1][1][j-1];
        }
        dp[i][0][1] = dp[i][0][1] + dp[i+1][1][B];
    }
    for(i = 1; i <= A; ++i)
        dp[0][0][0] = dp[0][0][0] + dp[1][0][i];
    for(i = 1; i <= B; ++i)
        dp[0][0][0] = dp[0][0][0] + dp[1][1][i];
    dp[0][0][0].Print();
    Huge sum;
    int last = -1;
    for( i = 1; i <= N ;)
    {
        if(last!=0)
        {
            for( j = A;j ; --j)
                if( (dp[i][0][j]== a) < 0)
                    a.sub(dp[i][0][j]);
                else
                {
                    i += j;
                    while(j)
                    {
                        printf("0");
                        --j;
                    }
                    last = 0;
                    break;
                }
        }
        if(last != 1)
        {
            for(j = 1; j <= B && i + j-1 <= N ;++j)
                if( (dp[i][1][j]== a) < 0)
                    a.sub(dp[i][1][j]);
                else
                {
                    i += j;
                    while(j)
                    {
                        printf("1");
                        --j;
                    }
                    last = 1;
                    break;
                }
        }
    }
    printf("\n");
    return 0;
}