Number Logic Puzzle 2103

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 one park.

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