526互联

upside

2023.12 ~ After the ice turns into water / the sea I hang upside down will be your sky.

COCI 2023.11 LOJ3999 考虑把填数过程倒过来做，那么就变成了覆盖。 设 \(f(i,j,0/1)\) 表示目前填进去 \(i\) 个数，且最后一个填的数是 \(j\)，并且 \(j\) 的位置在最左侧/最右侧的方案数。以 \(f(i,j,0)\) 为例，转移有： \(f(i,j,0 ......
the 2023.12 upside After turns

Go - Flipping an Image Upside Down

Problem: You want to flip an image upside down. Solution: Convert an image to a grid of pixels. Swap the positions of the top and bottom pairs of pixe ......
Flipping Upside Image Down Go
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