static int findPairs ( int arr [ ] , int n , int x ) {
  int l = 0 , r = n - 1 ;
  int result = 0 ;
  while ( l < r ) {
    if ( arr [ l ] + arr [ r ] < x ) {
      result += ( r - l ) ;
      l ++ ;
    }
    else r -- ;
  }
  return result ;
}

static int findPairs ( int arr [ ] , int n , int x ) { int l = 0 , r = n - 1 ; int result = 0 ; while ( l < r ) { if ( arr [ l ] + arr [ r ] < x ) { result += ( r - l ) ; l ++ ; } else r -- ; } return result ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (identifier))) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))))) (expression_statement (update_expression (identifier)))) alternative: (expression_statement (update_expression (identifier)))))) (return_statement (identifier))))