#include "bits/stdc++.h"
using namespace std;

#define REP(i, n) for(int i=0; i<(n); i++)

int N;
signed main()
{
    cin >> N;
    while(N > 1) {
        if (N == 3) {
            cout << 7;
            N -= 3;
        } else {
            cout << 1;
            N -= 2;
        }
    }
    cout << endl;
    return 0;
}