```cpp
10 20
WBRWBBRWBBRBWBRWBWRB
BRWBWBRBWBRBWBRBWBWB
RBWBWWBWBRWRWBWRRBWR
WBWRWBRBWRWWRWRWBRWB
RWBWRWRWRWWRBWWBRWWR
WBRWBWBWRBRBRBWRWBRW
BRWRWBRWBWRRBWRWBRWW
BWRWRWRRRRRRRRRRRWWR
BBBBBBWRWBBWWRWRRWBW
BRWBRBWBRBWBRBWBRRWW
123
*/
by ChangYiMing @ 2020-10-04 12:47:28
[14分提交记录](https://www.luogu.com.cn/record/39229001)
by ChangYiMing @ 2020-10-04 12:48:27
@[ChangYiMing](/user/228788) 自己造的？
by Chouquet @ 2020-10-04 13:28:07
嗯，保证数据的正确性。
by ChangYiMing @ 2020-10-04 18:13:16
您读入错了。。。
by _Cloud_ @ 2020-10-05 21:36:46
把scanf改成cin就过了。。。
```cpp
for(int i=1;i<=n;++i){
for(int j=1;j<=m;++j){
cin >> a[i][j];
}
// scanf("\n");
}
```
[还挺快。。。](https://www.luogu.com.cn/record/39333772)
by _Cloud_ @ 2020-10-05 21:37:54