<?php

/**
 * @see https://yukicoder.me/problems/no/83
 */

$input = trim(fgets(STDIN));

const MIN_AMAOUNT = 2;

$remainAmount = $input;
$stackNumbers = [];

while ($remainAmount >= MIN_AMAOUNT) {
    $stackNumbers[] = 1;
    $remainAmount -= 2;
}

echo implode("", $stackNumbers) . "\n";