static int maxSumWO3Consec ( int arr [ ] , int n ) {
  int sum [ ] = new int [ n ] ;
  if ( n >= 1 ) sum [ 0 ] = arr [ 0 ] ;
  if ( n >= 2 ) sum [ 1 ] = arr [ 0 ] + arr [ 1 ] ;
  if ( n > 2 ) sum [ 2 ] = Math . max ( sum [ 1 ] , Math . max ( arr [ 1 ] + arr [ 2 ] , arr [ 0 ] + arr [ 2 ] ) ) ;
  for ( int i = 3 ;
  i < n ;
  i ++ ) sum [ i ] = Math . max ( Math . max ( sum [ i - 1 ] , sum [ i - 2 ] + arr [ i ] ) , arr [ i ] + arr [ i - 1 ] + sum [ i - 3 ] ) ;
  return sum [ n - 1 ] ;
}

static int maxSumWO3Consec ( int arr [ ] , int n ) { int sum [ ] = new int [ n ] ; if ( n >= 1 ) sum [ 0 ] = arr [ 0 ] ; if ( n >= 2 ) sum [ 1 ] = arr [ 0 ] + arr [ 1 ] ; if ( n > 2 ) sum [ 2 ] = Math . max ( sum [ 1 ] , Math . max ( arr [ 1 ] + arr [ 2 ] , arr [ 0 ] + arr [ 2 ] ) ) ; for ( int i = 3 ; i < n ; i ++ ) sum [ i ] = Math . max ( Math . max ( sum [ i - 1 ] , sum [ i - 2 ] + arr [ i ] ) , arr [ i ] + arr [ i - 1 ] + sum [ i - 3 ] ) ; return sum [ n - 1 ] ; }
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