public static void main ( String [ ] args ) {
  Scanner k = new Scanner ( System . in ) ;
  String n = k . next ( ) ;
  String input = k . next ( ) ;
  int ans = 0 ;
  int c = input . charAt ( 0 ) == 'R' ? 1 : - 1 ;
  boolean pos = input . charAt ( 0 ) == 'R' ;
  for ( int i = 1 ;
  i < input . length ( ) ;
  i ++ ) {
    if ( input . charAt ( i ) == 'R' ) {
      c += 1 ;
      if ( c == 1 && pos == false ) {
        pos = true ;
        ans += 1 ;
      }
    }
    else if ( input . charAt ( i ) == 'U' ) {
      c -= 1 ;
      if ( c == - 1 && pos == true ) {
        pos = false ;
        ans += 1 ;
      }
    }
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner k = new Scanner ( System . in ) ; String n = k . next ( ) ; String input = k . next ( ) ; int ans = 0 ; int c = input . charAt ( 0 ) == ' R ' ? 1 : - 1 ; boolean pos = input . charAt ( 0 ) == ' R ' ; for ( int i = 1 ; i < input . length ( ) ; i ++ ) { if ( input . charAt ( i ) == ' R ' ) { c += 1 ; if ( c == 1 && pos == false ) { pos = true ; ans += 1 ; } } else if ( input . charAt ( i ) == ' U ' ) { c -= 1 ; if ( c == - 1 && pos == true ) { pos = false ; ans += 1 ; } } } System . out . println ( ans ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) 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))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (ternary_expression condition: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))) right: (character_literal)) consequence: (decimal_integer_literal) alternative: (unary_expression operand: (decimal_integer_literal))))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))) right: (character_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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (false)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (true))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal)))))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (unary_expression operand: (decimal_integer_literal))) right: (binary_expression left: (identifier) right: (true)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (false))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal)))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))