蓝桥杯（3.3）

1208. 翻硬币

import java.util.Scanner;

public class Main {
	public static void turn(char[] a,int i) {
		if(a[i] == '*')	a[i] = 'o';
		else	a[i] = '*';
	}
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		char[] a = sc.next().toCharArray();
		char[] b = sc.next().toCharArray();
		int c = a.length-1;
		int sum = 0;
		for(int i=0;i<c;i++) {
			if(a[i]!=b[i]) {
				sum++;
				turn(a,i);
				turn(a,i+1);
			}
		}
		System.out.println(sum);
	}
}