#include<cstdio>
using namespace std;
const int N=1e5+10; bool vis[N];
int main() {
  //freopen("highway.in","r",stdin);
  //freopen("highway.out","w",stdout);
  int n,m,u,v; scanf("%d %d",&n,&m);
  while(m--) scanf("%d %d",&u,&v),vis[u<v?u:v]=true;
  for(int i=n-1;i>=0;i--) {
    if(!vis[i]) continue;
    for(int j=i;j>=0;j--) printf("%d",vis[j]);
    break;
  }
  return 0;
}