题解 | 乒乓球

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner=new Scanner(System.in);
		String string=scanner.next();
		int count1=0;
		int count2=0;
		for (int i = 0; i < string.length(); i++) {
			char c=string.charAt(i);
			if(c=='W') {
				count1++;
			}else {
				count2++;
			}
			if(count1>=11||count2>=11) {
				if(Math.abs(count1-count2)>=2) {
					System.out.println(count1+":"+count2);
					count1=0;
					count2=0;
				}
			}
		}
		System.out.println(count1+":"+count2);
		count1=0;
		count2=0;
		System.out.println();
		for (int i = 0; i < string.length(); i++) {
			char c=string.charAt(i);
			if(c=='W') {
				count1++;
			}else {
				count2++;
			}
			if(count1>=21||count2>=21) {
				if(Math.abs(count1-count2)>=2) {
					System.out.println(count1+":"+count2);
					count1=0;
					count2=0;
				}
			}
		}
		System.out.println(count1+":"+count2);

	}

}

直接大模拟，按照要求一步步来，也不用考虑是否要存储之前的数据，直接再来一轮