typedef long long ll;
#include <bits/stdc++.h>
using namespace std;

int main() {
    ll n,k;
    std::cin >> n>>k;
    
    ll r = 1e10;
    ll l = 0;
    while(r-l>1){
        ll m = (r+l)/2;
        if( (m/k)*k*k+(m%k)*(m%k)>=n ){
            r = m;
        }else{
            l = m;
        }
    }
    
    std::cout << r << std::endl;
    vector<vector<ll>> ans(r,vector<ll>(r,0));
    for (int i = 0; i < r; i++) {
        for (int j = 0; j < r; j++) {
            if(i/k == j/k && n>0){
                ans[i][j]=1;
                n--;
            }
            std::cout << ans[i][j];
        }
        std::cout << std::endl;
    }
    
}