text: If we choose element from section 1 , we cannot have selection from same section in adjacent rows
code: dp [ i + 1 ] [ 0 ] = Math . max ( dp [ i ] [ 1 ] , dp [ i ] [ 2 ] ) + m1 ; dp [ i + 1 ] [ 1 ] = Math . max ( dp [ i ] [ 0 ] , dp [ i ] [ 2 ] ) + m2 ; dp [ i + 1 ] [ 2 ] = Math . max ( dp [ i ] [ 1 ] , dp [ i ] [ 0 ] ) + m3 ; }