public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int max = 1_000_005 ;
  int [ ] present = new int [ max ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    present [ sc . nextInt ( ) ] = sc . nextInt ( ) ;
  }
  int [ ] dp = new int [ max ] ;
  if ( present [ 0 ] > 0 ) {
    dp [ 0 ] = 1 ;
  }
  int mx = 0 ;
  for ( int i = 1 ;
  i < max ;
  i ++ ) {
    if ( present [ i ] == 0 ) {
      dp [ i ] = dp [ i - 1 ] ;
    }
    else {
      if ( present [ i ] >= i ) {
        dp [ i ] = 1 ;
      }
      else {
        dp [ i ] = dp [ i - present [ i ] - 1 ] + 1 ;
      }
    }
    mx = Math . max ( mx , dp [ i ] ) ;
  }
  System . out . println ( n - mx ) ;
  sc . close ( ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int max = 1_000_005 ; int [ ] present = new int [ max ] ; for ( int i = 0 ; i < n ; i ++ ) { present [ sc . nextInt ( ) ] = sc . nextInt ( ) ; } int [ ] dp = new int [ max ] ; if ( present [ 0 ] > 0 ) { dp [ 0 ] = 1 ; } int mx = 0 ; for ( int i = 1 ; i < max ; i ++ ) { if ( present [ i ] == 0 ) { dp [ i ] = dp [ i - 1 ] ; } else { if ( present [ i ] >= i ) { dp [ i ] = 1 ; } else { dp [ i ] = dp [ i - present [ i ] - 1 ] + 1 ; } } mx = Math . max ( mx , dp [ i ] ) ; } System . out . println ( n - mx ) ; sc . close ( ) ; }
(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: (decimal_integer_literal))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (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 (expression_statement (assignment_expression left: (array_access array: (identifier) index: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (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: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (block (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)))))) alternative: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal)))) alternative: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))) right: (decimal_integer_literal))) right: (decimal_integer_literal)))))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (array_access array: (identifier) index: (identifier)))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))