题解：P1319 压缩技术

#include<bits/stdc++.h>
using namespace std;
#define int long long
int n,a;
int endll,id=0,s;
signed main(){
	cin>>n;
	while(s<n*n){
		cin>>a;
		if(id==0){
			for(int i=1;i<=a;i++){
				if(endll==n){
					cout<<endl;
					endll=0;
				}
				cout<<"0";
				endll++;
				s++;
			}
		}else{
			for(int i=1;i<=a;i++){
				if(endll==n){
					cout<<endl;
					endll=0;
				}
				cout<<"1";
				endll++;
				s++;
			}	
		}
		id++;
		id%=2;
	}
	
	return 0;
}