joi-2009-2.js

var fs = require('fs'),
	sys = require('sys');

fs.readFile('1.txt', "utf-8", function (err, data) {
	data = data.split('\n');
	var nm = data[0].split(' '),
		n = +nm[0],
		m = +nm[1],
		step = 1,
		steps = data.slice(1, n+1),
		dices = data.slice(n);
		
	for (i in dices) {
		step += (+dices[i]);
		if (step >= n) {
			fs.writeFile('1.txt', i+"");
			break
		}
		step += (+steps[step-1]);
		sys.print(i+':'+step+'\n');
	}
});