Condition to check if the cyclic rotation is a valid rotation
if ( ( len ( v ) - 3 ) % 2 == 0 ) : NEW_LINE INDENT for i in range ( 1 , len ( v ) , 2 ) : NEW_LINE INDENT ans . append ( [ v [ 0 ] , v [ i ] , v [ i + 1 ] ] ) NEW_LINE DEDENT continue NEW_LINE DEDENT p . append ( v [ 0 ] ) NEW_LINE p . append ( v [ len ( v ) - 1 ] ) NEW_LINE