#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)s; i < (int)e; i++)

int main() {
    cin.tie(nullptr);
    
    int N;
    cin >> N;
    
    if (N % 2 == 0) {
        rep(i, 0, N / 2) cout << 1;
    } else {
        cout << 7;
        rep(i, 0, N / 2 - 1) cout << 1;
    }
    
    cout << '\n';
}