#include <bits/stdc++.h>
#define rep(i,j) for (int (i)=0;(i)<(int)(j);++(i))
#define put(i) cout << i << endl
using namespace std;

int main() {
    int n; cin >> n;
    if (n%2) cout << "7", n -= 3;
    while (n >= 2) cout << "1", n -= 2;
    cout << endl;
}