状态压缩

rt COGS3113 COGS3186 P5005 一份用来参考的 check ```cpp bool judge(int a,int b,int c){ if(((a<<1)&c)&(~(b&(b<<1))))return 0; if(((a>>1)&c)&(~(b&(b>>1))))return 0; if(((a<<2)&b)&(~((a&b)<<1)))return 0; if(((a>>2)&b)&(~((a&b)>>1)))return 0; return 1; } ```