static int countSubarray ( int arr [ ] , int n , int k ) {
  int start = 0 , end = 0 ;
  int count = 0 , sum = arr [ 0 ] ;
  while ( start < n && end < n ) {
    if ( sum < k ) {
      end ++ ;
      if ( end >= start ) count += end - start ;
      if ( end < n ) sum += arr [ end ] ;
    }
    else {
      sum -= arr [ start ] ;
      start ++ ;
    }
  }
  return count ;
}

static int countSubarray ( int arr [ ] , int n , int k ) { int start = 0 , end = 0 ; int count = 0 , sum = arr [ 0 ] ; while ( start < n && end < n ) { if ( sum < k ) { end ++ ; if ( end >= start ) count += end - start ; if ( end < n ) sum += arr [ end ] ; } else { sum -= arr [ start ] ; start ++ ; } } return count ; }
(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: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (array_access array: (identifier) index: (decimal_integer_literal)))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (binary_expression left: (identifier) right: (identifier)))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (update_expression (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (update_expression (identifier))))))) (return_statement (identifier))))