@@ -0,0 +1,564 @@
+// http://codeforces.com/problemset/problem/344/A%0A%0Aimport java.util.Scanner;%0A%0Apublic class Solution %7B%0A%09%0A%09public static void main(String%5B%5D args) %7B%0A%09%09Scanner read = new Scanner(System.in);%0A%09%09%0A%09%09int n = Integer.parseInt( read.nextLine() );%0A%09%09int groupCount = 0;%0A%0A%09%09String previousMagnetPair = %22%22;%0A%09%09for (int i = 0; i %3C n; ++i) %7B%0A%09%09%09String magnetPair = read.nextLine();%0A%09%09%09if ( !magnetPair.equals(previousMagnetPair) ) %7B%0A%09%09%09%09groupCount++;%0A%09%09%09%7D%0A%09%09%09previousMagnetPair = magnetPair;%0A%09%09%7D%0A%09%09%0A%09%09System.out.println( groupCount );%0A%09%09%0A%09%09// Close scanner%0A%09%09read.close();%0A%09%7D%0A%09%0A%7D%0A

Create Magnets.java