Nonograms, also known as Hanjie, Paint by Numbers, Picross, Griddlers and Pic-a-Pix,
are logic puzzles with pictures,
in which the cells in the grid must be colored or left blank according to the numbers on the edges of the grid,
to reveal hidden information.
In this puzzle, numbers represent a shape that measures,
how many continuous lines of filled squares are there in any row or column.