function Main(input) {

	var lines = input.split("\n");
	// N
	var stickCount=parseInt(lines[0]);

	var digitCount = parseInt(stickCount / 2);
	//console.log(digitCount);
	var lastEqualSeven = false;
	var rest = stickCount % 2;

	if( 0 < rest ) {
		if( 0 < digitCount )
		{
			lastEqualSeven = true;
		}
	}

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

	console.log(strCount);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));