Blocked View Skyscrapers: B1

Blocked View Skyscrapers puzzle type I created for "Contest for best logic innovation". This puzzle is the variation of famous skyscraper puzzle.

Rules of Blocked View Skyscrapers Puzzle

Fill the grid with digits 1 to 4, so that each digits appears exactly once in every row/column. The cells in the grid can be thought of as individual buildings, and the number inside the building is the number of floors. A number outside the grid indicates how many buildings can be "seen" from the corresponding direction. Additionally each row/column contains a blocker. Observer cannot see beyond the blocker. 

A building is seen by an observer if there are not buildings taller (with a greater number), between it and the observer and it is not blocked by a blocker in that direction.

Blocked View Skyscrapers-B1