Arithmetic Progression | Returns true if a permutation of arr [ 0. . n - 1 ] can form arithmetic progression ; Sort array ; After sorting , difference between consecutive elements must be same . ; Driver code
def checkIsAP ( arr , n ) : NEW_LINE INDENT if ( n == 1 ) : return True NEW_LINE arr . sort ( ) NEW_LINE d = arr [ 1 ] - arr [ 0 ] NEW_LINE for i in range ( 2 , n ) : NEW_LINE INDENT if ( arr [ i ] - arr [ i - 1 ] != d ) : NEW_LINE INDENT return False NEW_LINE DEDENT DEDENT return True NEW_LINE DEDENT arr = [ 20 , 15 , 5 , 0 , 10 ] NEW_LINE n = len ( arr ) NEW_LINE print ( " Yes " ) if ( checkIsAP ( arr , n ) ) else print ( " No " ) NEW_LINE