public static void main ( String [ ] args ) {
  Scanner scan = new Scanner ( System . in ) ;
  int N = scan . nextInt ( ) ;
  long lbase = 0 ;
  long rbase = 0 ;
  PriorityQueue < Long > lindex = new PriorityQueue < > ( Collections . reverseOrder ( ) ) ;
  PriorityQueue < Long > rindex = new PriorityQueue < > ( ) ;
  long [ ] l = new long [ N ] ;
  long [ ] w = new long [ N ] ;
  for ( int i = 0 ;
  i < N ;
  ++ i ) {
    l [ i ] = scan . nextLong ( ) ;
    w [ i ] = scan . nextLong ( ) - l [ i ] ;
  }
  lindex . add ( l [ 0 ] ) ;
  rindex . add ( l [ 0 ] ) ;
  long ans = 0 ;
  for ( int i = 1 ;
  i < N ;
  ++ i ) {
    lbase += w [ i ] ;
    rbase += w [ i - 1 ] ;
    if ( lindex . peek ( ) >= ( l [ i ] + lbase ) ) {
      lindex . add ( l [ i ] + lbase ) ;
      lindex . add ( l [ i ] + lbase ) ;
      ans += Math . abs ( lindex . peek ( ) - ( l [ i ] + lbase ) ) ;
      rindex . add ( lindex . poll ( ) - lbase - rbase ) ;
    }
    else if ( rindex . peek ( ) <= ( l [ i ] - rbase ) ) {
      rindex . add ( l [ i ] - rbase ) ;
      rindex . add ( l [ i ] - rbase ) ;
      ans += Math . abs ( rindex . peek ( ) - ( l [ i ] - rbase ) ) ;
      lindex . add ( rindex . poll ( ) + lbase + rbase ) ;
    }
    else {
      lindex . add ( l [ i ] + lbase ) ;
      rindex . add ( l [ i ] - rbase ) ;
    }
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner scan = new Scanner ( System . in ) ; int N = scan . nextInt ( ) ; long lbase = 0 ; long rbase = 0 ; PriorityQueue < Long > lindex = new PriorityQueue < > ( Collections . reverseOrder ( ) ) ; PriorityQueue < Long > rindex = new PriorityQueue < > ( ) ; long [ ] l = new long [ N ] ; long [ ] w = new long [ N ] ; for ( int i = 0 ; i < N ; ++ i ) { l [ i ] = scan . nextLong ( ) ; w [ i ] = scan . nextLong ( ) - l [ i ] ; } lindex . add ( l [ 0 ] ) ; rindex . add ( l [ 0 ] ) ; long ans = 0 ; for ( int i = 1 ; i < N ; ++ i ) { lbase += w [ i ] ; rbase += w [ i - 1 ] ; if ( lindex . peek ( ) >= ( l [ i ] + lbase ) ) { lindex . add ( l [ i ] + lbase ) ; lindex . add ( l [ i ] + lbase ) ; ans += Math . abs ( lindex . peek ( ) - ( l [ i ] + lbase ) ) ; rindex . add ( lindex . poll ( ) - lbase - rbase ) ; } else if ( rindex . peek ( ) <= ( l [ i ] - rbase ) ) { rindex . add ( l [ i ] - rbase ) ; rindex . add ( l [ i ] - rbase ) ; ans += Math . abs ( rindex . peek ( ) - ( l [ i ] - rbase ) ) ; lindex . add ( rindex . poll ( ) + lbase + rbase ) ; } else { lindex . add ( l [ i ] + lbase ) ; rindex . add ( l [ i ] - rbase ) ; } } System . out . println ( ans ) ; }
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(type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) 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))))) (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: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (array_access array: (identifier) index: (identifier))))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: 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(parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: 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(method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier)))))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier)) right: (identifier)))))) alternative: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: 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