#include <bits/stdc++.h>

using namespace std;

int main() {
    int n;
    cin >> n;

    if (n % 2 == 0) {
        for (int i = 0; i < n / 2; ++i) {
            cout << 1;
        }
    } else {
        cout << 7;
        for (int i = 0; i < (n - 3) / 2; ++i) {
            cout << 1;
        }
    }
    cout << endl;
    return 0;
}