public static void main ( String [ ] args ) throws Exception {
  Scanner sc = new Scanner ( System . in ) ;
  int A = sc . nextInt ( ) ;
  int B = sc . nextInt ( ) ;
  String S = sc . next ( ) ;
  if ( S . substring ( 0 , A ) . contains ( "-" ) ) {
    System . out . println ( "No" ) ;
    return ;
  }
  if ( ! ( S . substring ( A , A + 1 ) . contains ( "-" ) ) ) {
    System . out . println ( "No" ) ;
    return ;
  }
  if ( S . substring ( A + 1 , A + B + 1 ) . contains ( "-" ) ) {
    System . out . println ( "No" ) ;
    return ;
  }
  System . out . println ( "Yes" ) ;
}

public static void main ( String [ ] args ) throws Exception { Scanner sc = new Scanner ( System . in ) ; int A = sc . nextInt ( ) ; int B = sc . nextInt ( ) ; String S = sc . next ( ) ; if ( S . substring ( 0 , A ) . contains ( " - " ) ) { System . out . println ( " No " ) ; return ; } if ( ! ( S . substring ( A , A + 1 ) . contains ( " - " ) ) ) { System . out . println ( " No " ) ; return ; } if ( S . substring ( A + 1 , A + B + 1 ) . contains ( " - " ) ) { System . out . println ( " No " ) ; return ; } System . out . println ( " Yes " ) ; }
(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: (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: (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)))) (if_statement condition: (parenthesized_expression (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (identifier))) name: (identifier) arguments: (argument_list (string_literal)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (return_statement))) (if_statement condition: (parenthesized_expression (unary_expression operand: (parenthesized_expression (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (decimal_integer_literal)))) name: (identifier) arguments: (argument_list (string_literal)))))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (return_statement))) (if_statement condition: (parenthesized_expression (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)))) name: (identifier) arguments: (argument_list (string_literal)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (return_statement))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))))