$stickCount=<STDIN>;
chomp($stickCount);

$digitCount = $stickCount / 2;
$rest = $stickCount % 2;
$lastEqualSeven = (0<$rest);


$strCount = "1";
if( $lastEqualSeven )
{
	$strCount = "7";
}
for( $i=1; $i < $digitCount; $i++ )
{
	$strCount .= "1";
}

print("${strCount}\n");