joi-2010-2.js

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

var result = function (file) {
	fs.readFile(file, "utf-8", function (err, data) {
		err && sys.print(err)
		
		var search = '';
		var r = 0;
		data.split('\r\n').forEach(function (val, i) {
			if (i == 0) {
				search = val;
			} else if (i >= 2 && (val+val).indexOf(search) != -1) {
				r++;
			}
		})		
		
		fs.writeFile(file, r+"");
	});
}

result('2011-yo-t2-in_s1.txt')