#include "bits/stdc++.h"
using namespace std;

#define REP(i, n) for(int i=0; i<(n); i++)

int N;
signed main()
{
    cin >> N;
    if (N % 2 == 1) {
        cout << 7;
        N -= 3;
    }
    while(N > 1) {
        cout << 1;
        N -= 2;
    }
    cout << endl;
    return 0;
}