#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;++i)
using namespace std;

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