#include <bits/stdc++.h>
using namespace std;
#define int long long
int n,m;
signed main(){
	freopen("replace.in","r",stdin);
	freopen("replace.out","w",stdout);
	cin>>n>>m;
	for (int i=1;i<=n;i++){
		string s;
		cin>>s;
		cin>>s;
	}
	for (int i=1;i<=m;i++) cout<<0;
	return 0;
} 
