weixin_43179892的博客

POJ-3250（单调栈）Some of Farmer John’s N cows (1 ≤ N ≤ 80,000) are having a bad hair day! Since each cow is self-conscious about her messy hairstyle, FJ wants to count the number of other cows that can s...

CodeForces 280B Maximum Xor Secondary（单调栈）Bike loves looking for the second maximum element in the sequence. The second maximum element in the sequence of distinct numbers x1, x2, …, xk (k > 1) is...