Initialize the every row with size 2 ( 1 for numerator and 2 for denominator )
arr [ 0 , 0 ] = 9 ; arr [ 0 , 1 ] = 10 ; arr [ 1 , 0 ] = 12 ; arr [ 1 , 1 ] = 25 ; arr [ 2 , 0 ] = 18 ; arr [ 2 , 1 ] = 35 ; arr [ 3 , 0 ] = 21 ; arr [ 3 , 1 ] = 40 ;