翻硬币Java

跟前面比起来，显然是最轻松的一集

Java样例

import java.util.*;
public class Main {
    static char[] op;
    static char[] end;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        op = sc.nextLine().toCharArray();
        end = sc.nextLine().toCharArray();
        int n = op.length;

        int step=0;
        for(int i=0;i<n;i++) {
            if(op[i]!=end[i]) {
                step++;
                turn(i,n);
            }
        }
        System.out.println(step);
    }
    public static void turn(int i,int n) {
        if(op[i]=='o') op[i]='*';
        else op[i]='o';
        if(i+1<n) {
            if(op[i+1]=='o') op[i+1]='*';
            else op[i+1]='o';
        }
    }
}