20分,求调

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



int main()
{

	int n, x, sum = 0, hang = 0, shu = 0;
	cin >> n;
	while (sum != n*n){
		cin >> x;
		if (x+hang >= n){
			for (int i = 1; i <= n-hang; i++){
				if (shu%2 != 0){
					cout << 1;
				}
				else{
					cout << 0;
				}
			}
			hang = hang+x-n;
			cout << endl;
			for (int i = 1; i <= hang; i++){
				if (shu%2 != 0){
					cout << 1;
				}
				else{
					cout << 0;
				}
			}
		}
		else{
			for (int i = 1; i <= x; i++){
				if (shu%2 != 0){
					cout << 1;
				}
				else{
					cout << 0;
				}
			}
			hang += x;
		}
		shu++;
		sum += x;
	}

	return 0;
}