1790-generator.js

var output = "";

/**
 * EXPLAINING
 *
 * The 'output' var holds the string with the generated output,
 * which should be used as INPUT in the PA
 *
 * HOW TO USE
 *
 * > copy all this code (yes, all of it)
 * > open the console browser (hit f12 in your browser, then go to console tab)
 * > this console runs javascript, paste all this code there and hit enter.
 * > call the function genN, passing the number of test cases you want.
 * > the output will be in the 'output' var
 *
 * EXAMPLE
 *
 * genN(5); // 5 test cases
 */

function genN(_n) {
	output = "";

	var i;
	var c, p, max;

	for(i=0; i<_n; i++) {
		c = rand(1, 25);
		max = (c*c + c - 2)/2;
		p = rand(1, max > 20 ? max : 20);

		gen(c, p);
	}

	return output;
}

function gen(c, p) {
	output += c + " " + p + "\n";
	var i;
	var random;

	for(i=0; i<p; i++) {
		random = rand(1, c);
		output += random + " ";
		random = rand(1, c);
		output += random + "\n";
	}
}

function rand(min, max) {
	var n;

	n = Math.random() * (max * 1000);
	n = Math.floor(n);
	n = (n%max) + min;

	return n;
}