#include <iostream>
#include <cstdlib>
#include <vector>
#include <climits>
#include <algorithm>
#include <cmath>
#include <tuple>
#include <set>
#include <iomanip>

using namespace std;

int main()
{
    int n;
    cin >> n;
    string s;
    while(n != 0) {
        if(n>=3 && n%2==1) {
            cout << 7;
            n-=3;
        } else if(n%2==0){
            cout << 1;
            n-=2;
        } else
            break;
    }
    cout << endl;
}