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Описание задачи: Task: There is a landscape with hills and pits which have similar square shape. Each position in this landscape has a specified height. Max number of positions is 32000. Height is between 0 and 32000. For example: the first position has height 5, the second position has height 2. The landscape can be presented as a collection of heights. {5,2,3,4,5,4,0,3,1}

When rain happens, landscape is filled with water. Water is collected inside pits only between hills

You need to implement an application which calculates amount of collected water for any landscapes. Water calculator should implement method long calculateWaterAmount(int[] landscape)