public static void main ( String [ ] args ) {
  Scanner in = new Scanner ( System . in ) ;
  int n = in . nextInt ( ) ;
  int x0 = in . nextInt ( ) ;
  int y0 = in . nextInt ( ) ;
  boolean x0Line = false ;
  boolean y0Line = false ;
  Set < Double > set = new HashSet < > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int x = in . nextInt ( ) - x0 ;
    int y = in . nextInt ( ) - y0 ;
    if ( x == 0 ) x0Line = true ;
    else if ( y == 0 ) y0Line = true ;
    else set . add ( ( double ) y / ( double ) x ) ;
  }
  System . out . println ( ( x0Line ? 1 : 0 ) + ( y0Line ? 1 : 0 ) + set . size ( ) ) ;
}

public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; int n = in . nextInt ( ) ; int x0 = in . nextInt ( ) ; int y0 = in . nextInt ( ) ; boolean x0Line = false ; boolean y0Line = false ; Set < Double > set = new HashSet < > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { int x = in . nextInt ( ) - x0 ; int y = in . nextInt ( ) - y0 ; if ( x == 0 ) x0Line = true ; else if ( y == 0 ) y0Line = true ; else set . add ( ( double ) y / ( double ) x ) ; } System . out . println ( ( x0Line ? 1 : 0 ) + ( y0Line ? 1 : 0 ) + set . size ( ) ) ; }
(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) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (false))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (false))) (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)))) (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 (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (true))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (true))) alternative: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (cast_expression type: (floating_point_type) value: (identifier)) right: (cast_expression type: (floating_point_type) value: (identifier)))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (parenthesized_expression (ternary_expression condition: (identifier) consequence: (decimal_integer_literal) alternative: (decimal_integer_literal))) right: (parenthesized_expression (ternary_expression condition: (identifier) consequence: (decimal_integer_literal) alternative: (decimal_integer_literal)))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))))))