Instruction
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Problem
A peak element is an element that is
greater than its neighbors. There is an
integer matrix (see the figure) which has
the following features: the numbers in
adjacent positions are different; the
matrix has n rows and m columns; and a
is a 2D-peak iff a b, a d, a c, a e.
(hint: you only need to compare the
elements which has exactly four neighbors.)
Write a program to find a peak element which is an element a that is not smaller than its neighbors b, c, d. Return the element of the peak.
Sample input
1,2,3,6,5,16,41,23,22,6,15,17,20,21,7,14,18,19,20,10,13,14,11,10,9
2,2,4,6,8,21,27,30,31,6,16,20,24,28,9,14,18,19,20,13,5,14,7,10,1
Sample output
Find it! The peak elements is 41
Find it! The peak elements is 31
