ACM-荷兰国旗问题

3
BBRRWBWRRR
RRRWWRWRB
RBRW 

RRRRRWWBBB
RRRRRWWWB
RRWB 

代码：

01.#include<iostream>
02.#include<string>
03.using namespace std;
04.int main()
05.{
06.int t;
07.cin>>t;
08.while(t--)
09.{
10.string str;
11.int i,j,k,m,n,len,a[1001];
12.cin>>str;
13.len = str.length();
14.for(i = 0;i <len;i++)
15.a[i] = str[i] -‘0‘;
16.m= 0;j= 0;k= 0;
17.for(i = 0;i < len;i++)
18.{
19.n = a[i];
20.switch(n)
21.{
22.case 18:m++;break;
23.case 34:j++;break;
24.case 39:k++;break;
25.}
26.}
27.//cout<<m<<j<<k;
28.for(i = 0;i < j;i++)
29.cout<<"R";
30.for(i = 0;i < k;i++)
31.cout<<"W";
32.for(i = 0;i < m;i++)
33.cout<<"B";
34.cout<<endl;
35.}
36.return 0;
37.}