[编程题] 彩色瓷砖分析代码

import java.util.*;

public class Main {
    
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        
        String s = in.nextLine();
        
        in.close();
        
        System.out.println(replace(s,s.length()));
        
    }
    
    
    private static int replace(String s, int len) {
        
        int count = 0;
        
        for(int i=1;i<len;i++) {
            if(s.charAt(i) == s.charAt(i-1)) {
                count++;
                i++;
            }
        }
        return count;
    } 
    
}