public static void main ( String [ ] args ) throws Exception {
  InputStreamReader ip = new InputStreamReader ( System . in ) ;
  BufferedReader br = new BufferedReader ( ip ) ;
  int t = Integer . parseInt ( br . readLine ( ) ) ;
  StringBuilder sb = new StringBuilder ( ) ;
  while ( t -- > 0 ) {
    int n = Integer . parseInt ( br . readLine ( ) ) ;
    String str = ( br . readLine ( ) ) . trim ( ) ;
    int cw = 0 , acw = 0 , bh = 0 ;
    int ans = 0 ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      if ( str . charAt ( i ) == '-' ) {
        if ( str . charAt ( ( ( i - 1 ) + n ) % n ) == str . charAt ( i ) ) {
          ans ++ ;
        }
        else {
          ans += 2 ;
        }
        bh ++ ;
      }
      else if ( str . charAt ( i ) == '>' ) {
        cw ++ ;
      }
      else {
        acw ++ ;
      }
    }
    if ( acw == n || cw == n || bh == n ) {
      System . out . println ( n ) ;
    }
    else if ( ( acw + bh ) == n || ( cw + bh ) == n ) {
      System . out . println ( n ) ;
    }
    else {
      System . out . println ( ans ) ;
    }
  }
}

public static void main ( String [ ] args ) throws Exception { InputStreamReader ip = new InputStreamReader ( System . in ) ; BufferedReader br = new BufferedReader ( ip ) ; int t = Integer . parseInt ( br . readLine ( ) ) ; StringBuilder sb = new StringBuilder ( ) ; while ( t -- > 0 ) { int n = Integer . parseInt ( br . readLine ( ) ) ; String str = ( br . readLine ( ) ) . trim ( ) ; int cw = 0 , acw = 0 , bh = 0 ; int ans = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( str . charAt ( i ) == ' - ' ) { if ( str . charAt ( ( ( i - 1 ) + n ) % n ) == str . charAt ( i ) ) { ans ++ ; } else { ans += 2 ; } bh ++ ; } else if ( str . charAt ( i ) == ' > ' ) { cw ++ ; } else { acw ++ ; } } if ( acw == n || cw == n || bh == n ) { System . out . println ( n ) ; } else if ( ( acw + bh ) == n || ( cw + bh ) == n ) { System . out . println ( n ) ; } else { 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))) (throws (type_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: (object_creation_expression type: (type_identifier) arguments: (argument_list (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list)))) (while_statement condition: (parenthesized_expression (binary_expression left: (update_expression (identifier)) right: (decimal_integer_literal))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (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 (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (identifier))) right: (identifier)))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) consequence: (block (expression_statement (update_expression (identifier)))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (expression_statement (update_expression (identifier)))) 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 (update_expression (identifier)))) alternative: (block (expression_statement (update_expression (identifier)))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (binary_expression left: (identifier) right: (identifier))) right: (binary_expression left: (identifier) right: (identifier)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (identifier)) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (identifier)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier)))))))))))