Number Logic Puzzle 2007

Type: Skyscraper, Sum
Size: 5 1 Park
Points: 25, Penalty:0, Time : Initializing..  
01
23
4

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.