#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n;
    if (n == 0 || n == 1) cout << "NOTHING";
    else if (n % 2 == 0) {
        int c = n/2;
        for (int i=0; i<c; i++) cout << '1';
    }
    else {
        int c = (n-3)/2;
        cout << '7';
        for (int i=0; i<c; i++) cout << '1';
    }
    cout << endl;
    return 0;
}