Check if it is possible to move from ( 0 , 0 ) to ( x , y ) in N steps | Function to check whether it is possible or not to move from ( 0 , 0 ) to ( x , y ) in exactly n steps ; Driver code
< ? php function Arrive ( $ a , $ b , $ n ) { if ( $ n >= abs ( $ a ) + abs ( $ b ) and ( $ n - ( abs ( $ a ) + abs ( $ b ) ) ) % 2 == 0 ) return true ; return false ; } $ a = 5 ; $ b = 5 ; $ n = 11 ; if ( Arrive ( $ a , $ b , $ n ) ) echo " Yes " ; else echo " No " ;