#include<bits/stdc++.h>
using namespace std;
int sum,n,x,b;
int main(){
    cin>>n;
    while(cin>>x){
        while(x--){
            cout<<b;
            sum++;
            if(sum==n){
                cout<<endl;
                sum=0;
            }
        }
        b=(b+1)%2;
    }
}

17行解决