#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <cmath>
#include <numeric>
#include <utility>
#include <iomanip>

using namespace std;
using int64 = long long;

struct aaa{aaa(){cin.tie(nullptr); ios::sync_with_stdio(false); cout<<fixed<<setprecision(20);};}aaa;

int main() {
    int n;
    cin >> n;
    if (n%2) {
        cout << 7;
        n -= 3;
    }

    for (int i=0; i<n/2; i++) cout << 1;
    cout << endl;
}