#include <bits/stdc++.h>
using namespace std;
 
#define fi first
#define se second
#define pb push_back
using vi = vector <int>;
using ll = long long;
using pii = pair <int, int>;
const ll mod = 998244353;
//~ const ll mod = 1e9 + 7;
ll qpow(ll a, ll b, ll m = mod) { ll r = 1, t = a;
	for(; b; b /= 2) { if(b & 1) r = r * t % m; t = t * t % m; } return r; }

int main() {
	ios :: sync_with_stdio(false);
	int n; cin >> n;
	if(n & 1) {
		cout << 7;
		n -= 3;
	}
	
	while(n) {
		cout << 1;
		n -= 2;
	}
	
	cout << '\n';
}