import java.util.*; import java.lang.*; import java.io.*; class Ideone{ public static void main(String[] args) throws Exception{ // your code goes here BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int n = Integer.parseInt(br.readLine()); String s = br.readLine(); String t = br.readLine(); int ans = 0; for(int i=0;i