#include <bits/stdc++.h>
#define rep(i,n) for (int i=0; i<(n); ++i)
using namespace std;
using ll=long long;
int main(){
    int n;
    cin>>n;
    if(n%2==0){
        n/=2;
        rep(i,n){
            cout<<1;
        }
        return 0;
    }
    if(n%2==1){
        int cnt=n/2-1;
        rep(i,cnt){
            cout<<1;
        }
        cout<<7;
        return 0;
    }
}