luogu1146

#include<bits/stdc++.h>#define fr(i,a,b) for(int i=(a),i_end=(b);i<=i_end;i++)#define frd(i,a,b) for(int i=(a),i_end=(b);i>=i_end;i--)#define ll long long#define pri(x) printf("%d",x)#define mes(x) memset(x,0,sizeof(x))#define prin(x) printf("%d\n",x)#define ln putchar('\n')using namespace std;int n,a[10010];int main(){    cin>>n;    cout<<n<<endl;    fr(i,1,n){        fr(j,1,n)            a[j]^=1;        a[i]^=1;        fr(j,1,n)            cout<<a[j];        ln;    }    return 0;}