#include <bits/stdc++.h>

using namespace std;

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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    int n;
    cin >> n;
    if (n % 2 == 0) {
        REP(i, n / 2) cout << 1;
    } else {
        switch (n % 3) {
            case 0:
                REP(i, n / 3) cout << 7;
                break;
            case 1:
                REP(i, n / 3 - 1) cout << 7;
                cout << 11;
                break;
            case 2:
                REP(i, n / 3) cout << 7;
                cout << 1;
                break;
        }
    }
    cout << endl;
    return 0;
}