`if(a[i]!=a[i+1]&&a[i+1]!='w')`如果`a[i-1]==a[i+1]`而`a[i]=='w'`的话就会出问题.
`for(int i=1;i<=3*n;i++) a[i]=c[i];`这里`i`和外层重复了.
而且您是否有考虑全是`w`的情况.
by konjacp @ 2020-07-19 11:55:56
@[konjacp](/user/186403) 已经AC了,谢谢大佬
by zlybjthcydxxjqpyxgwt @ 2020-07-21 22:15:05