static int MaximumNumbers ( String s ) {
  int n = s . length ( ) ;
  int [ ] remIndex = {
    - 1 , - 1 , - 1 };
    remIndex [ 0 ] = 0 ;
    int [ ] res = new int [ n + 1 ] ;
    int r = 0 ;
    for ( int i = 1 ;
    i <= n ;
    i ++ ) {
      r = ( r + s . charAt ( i - 1 ) - '0' ) % 3 ;
      res [ i ] = res [ i - 1 ] ;
      if ( remIndex [ r ] != - 1 ) res [ i ] = Math . max ( res [ i ] , res [ remIndex [ r ] ] + 1 ) ;
      remIndex [ r ] = i + 1 ;
    }
    return res [ n ] ;
  }
  
static int MaximumNumbers ( String s ) { int n = s . length ( ) ; int [ ] remIndex = { - 1 , - 1 , - 1 } ; remIndex [ 0 ] = 0 ; int [ ] res = new int [ n + 1 ] ; int r = 0 ; for ( int i = 1 ; i <= n ; i ++ ) { r = ( r + s . charAt ( i - 1 ) - '0' ) % 3 ; res [ i ] = res [ i - 1 ] ; if ( remIndex [ r ] != - 1 ) res [ i ] = Math . max ( res [ i ] , res [ remIndex [ r ] ] + 1 ) ; remIndex [ r ] = i + 1 ; } return res [ n ] ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_initializer (unary_expression operand: (decimal_integer_literal)) (unary_expression operand: (decimal_integer_literal)) (unary_expression operand: (decimal_integer_literal))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (decimal_integer_literal))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (character_literal))) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (unary_expression operand: (decimal_integer_literal)))) consequence: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)) (binary_expression left: (array_access array: (identifier) index: (array_access array: (identifier) index: (identifier))) right: (decimal_integer_literal))))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (return_statement (array_access array: (identifier) index: (identifier)))))