#include <bits/stdc++.h>
using namespace std;
#define INF 1000000000000000000
using ll=long long;
using Graph=vector<vector<int>>;

int main(){
  int N;
  cin>>N;
  if(N%2==0){
    for(int i=0;i<N/2;i++){
      cout<<1;
    }
    cout<<endl;
  }else{
    cout<<7;
    for(int i=0;i<(N-3)/2;i++){
      cout<<1;
    }
    cout<<endl;
  }
}