CZYZ Training Day2 (8.8)

B : chorus
Diff : Easy-Normal(3)
Comment : How did I get to 100:

Such as:

But….
When I change this:

I = LIS(stu);D = LDS(stu);

to this:

cpy = stu;
reverse(cpy.begin(), cpy.end());
I = LIS(stu);D = LIS(cpy);

……¿¿¿¿¿¿

So, CHECK YOUR CODE SERIOUSLY.