#include <bits/stdc++.h>

#define show(x) cerr << #x << " = " << x << endl

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
    os << "sz=" << v.size() << "\n[";
    for (const auto& p : v) {
        os << p << ",";
    }
    os << "]\n";
    return os;
}

template <typename S, typename T>
ostream& operator<<(ostream& os, const pair<S, T>& p)
{
    os << "(" << p.first << "," << p.second
       << ")";
    return os;
}


constexpr ll MOD = 1e9 + 7;

template <typename T>
constexpr T INF = numeric_limits<T>::max() / 100;

constexpr int num[10] = {6, 2, 5, 5, 4, 5, 6, 3, 7, 6};

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