private static int dp ( int n , int [ ] a ) {
  if ( n == 1 || n == 2 ) return n ;
  int [ ] dp = new int [ n ] ;
  dp [ 0 ] = 1 ;
  dp [ 1 ] = 2 ;
  int max = 0 ;
  for ( int i = 2 ;
  i < n ;
  i ++ ) {
    if ( a [ i ] == a [ i - 1 ] + a [ i - 2 ] ) dp [ i ] = dp [ i - 1 ] + 1 ;
    else dp [ i ] = 2 ;
    max = Math . max ( max , dp [ i ] ) ;
  }
  return max ;
}

private static int dp ( int n , int [ ] a ) { if ( n == 1 || n == 2 ) return n ; int [ ] dp = new int [ n ] ; dp [ 0 ] = 1 ; dp [ 1 ] = 2 ; int max = 0 ; for ( int i = 2 ; i < n ; i ++ ) { if ( a [ i ] == a [ i - 1 ] + a [ i - 2 ] ) dp [ i ] = dp [ i - 1 ] + 1 ; else dp [ i ] = 2 ; max = Math . max ( max , dp [ i ] ) ; } return max ; }
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