#include <iostream>
#include <cstdio>
#include <string>
#include <vector>

std::string s;
int n;
int l;
int k;

int main()
{
    freopen("substring.in", "r", stdin);
    freopen("substring.out", "w", stdout);

    std::cin>>s;
    scanf("%d %d",&l, &k);
    n = s.size();
    int curZeroes = 0;
    int cur;

    for(int i = 0; i <= n-l; i++)
    {
        if(s[i] == '0')
            curZeroes++;
    }


    if(curZeroes >= n/2)
        std::cout<<"Yes"<<std::endl;
    else
        std::cout<<"No"<<std::endl;
    return 0;
}