Number Logic Puzzle 2005

Type: Skyscraper, Sum
Size: 4 1 Park
Points: 16, Penalty:0, Time : Initializing..  
01
23

Rules:

This puzzle has Parks (empty cells). The goal is to fill in each cell with numbers from 1 to N-1, where N is the size of the puzzle's side.

Each column and each row have exactly one of each number and N parks.

The numbers along the edge of the puzzle indicate the sum of heights of the visible buildings.

This puzzle has a Diagonal Variant. Every diagonal line contains each of the digits only once.