Description: Problem Description : Although left Pukou, but in Pukou Campus of the mountain we also have the impression it. You know a hill under the snow in winter is the time to ski, ski SEU like, it is not surprising, because skiing is very stimulating, but in order to obtain the speed, skiing region must downward slopping. but in the end when you had to re-entering the sliding weight above. SEU would like to know the longest in the region of landslide. From the region is a two-dimensional array. Every one of the array of figures on the hillside a high point. Here is an example : a person can be slid from a point adjacent to the next around one of the four points, and only if highly reduced. In the example above, a possible landslide as 24-17-16-1 (from 24, in a conclusion). Of course 25-24-23
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