#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define SZ(n) (int)(n).size()
#define ALL(n) (n).begin(), (n).end()
using namespace std;
typedef long long LL;
typedef vector<int> VI;

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