Skyscrapers Rule
Every row and column contains a number only once.
You can't see a shorter skyscraper behind a taller one.
The clues tell you how many skyscrapers you can see in that direction.
Complete the grid such that every row and column contains the numbers 1 to the size of the grid.
Skyscrapers consists of a square grid. The goal is to fill in each cell with numbers from 1 to N, where N is the size of the puzzle's side. No number may appear twice in any row or column. The numbers along the edge of the puzzle indicate the number of buildings which you would see from that direction if there was a series of skyscrapers with heights equal the entries in that row or column.