#include <algorithm>
#include <array>
#include <cstdio>
#include <iostream>
#include <numeric>
#include <optional>
#include <vector>

using namespace std;

int main() {
    int32_t n;
    cin >> n;
    if (n % 2 == 1) {
        cout << 7;
        n -= 3;
    }
    for (auto i = 0; i < n / 2; ++i) {
        cout << 1;
    }
    cout << endl;
    return 0;
}