//http://i...content-available-to-author-only...e.com/vNEv5A
//169445
#include <iostream>
#include <cstdio>
using namespace std;
 
int n, adj[105][105]={0}, c[105], a;
 
bool dfs(int v, int col) {
	if(c[v]!=-1 && c[v]==col) return true;
	else if(c[v]!=-1 && c[v]!=col) return false;
	c[v]=col;
	for(int i=0; i<n; i++) if(adj[v][i] && !dfs(i, 1-col)) return false;
	return true;
}
 
int main() {
	scanf("%d", &n);
	for(int i=0; i<n; i++) while(true) {
		scanf("%d", &a);
		if(a==0) break;
		adj[i][a-1]=adj[a-1][i]=1;
	}
	for(int i=0; i<105; i++) c[i]=-1;
	if(dfs(0, 0)==true) for(int i=0; i<n; i++) printf("%d", c[i]);
	else printf("-1");
	return 0;
}

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MwoyIDAKMyAwCjA=

3
2 0
3 0
0