public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int s = sc . nextInt ( ) ;
  int n = sc . nextInt ( ) ;
  int arr [ ] [ ] = new int [ n ] [ 2 ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < 2 ;
    j ++ ) {
      arr [ i ] [ j ] = sc . nextInt ( ) ;
    }
  }
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( arr [ i ] [ 0 ] < s ) {
      s += arr [ i ] [ 1 ] ;
      arr [ i ] = arr [ n - 1 ] ;
      n -- ;
      i = - 1 ;
    }
  }
  if ( n == 0 ) System . out . println ( "YES" ) ;
  else System . out . println ( "NO" ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int s = sc . nextInt ( ) ; int n = sc . nextInt ( ) ; int arr [ ] [ ] = new int [ n ] [ 2 ] ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < 2 ; j ++ ) { arr [ i ] [ j ] = sc . nextInt ( ) ; } } for ( int i = 0 ; i < n ; i ++ ) { if ( arr [ i ] [ 0 ] < s ) { s += arr [ i ] [ 1 ] ; arr [ i ] = arr [ n - 1 ] ; n -- ; i = - 1 ; } } if ( n == 0 ) System . out . println ( " YES " ) ; else System . out . println ( " NO " ) ; }
(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: (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: (integral_type) declarator: (variable_declarator name: (identifier) dimensions: (dimensions) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier)) dimensions: (dimensions_expr (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 (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))))) (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: (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal)) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (array_access array: (identifier) index: (identifier)) index: (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))))) (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (unary_expression operand: (decimal_integer_literal)))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))))))