static int waysToSplit ( String s ) {
  int n = s . length ( ) ;
  int answer = 0 ;
  for ( int i = 1 ;
  i < n ;
  i ++ ) {
    String left = s . substring ( 0 , i ) ;
    String right = s . substring ( i , n ) ;
    if ( distinctChars ( left ) == distinctChars ( right ) ) answer ++ ;
  }
  return answer ;
}

static int waysToSplit ( String s ) { int n = s . length ( ) ; int answer = 0 ; for ( int i = 1 ; i < n ; i ++ ) { String left = s . substring ( 0 , i ) ; String right = s . substring ( i , n ) ; if ( distinctChars ( left ) == distinctChars ( right ) ) answer ++ ; } return answer ; }
(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: (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 (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (identifier))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (identifier))) right: (method_invocation name: (identifier) arguments: (argument_list (identifier))))) consequence: (expression_statement (update_expression (identifier)))))) (return_statement (identifier))))