static int findMissing ( int arr [ ] , int n , int k , int avg ) {
  int sum = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    sum += arr [ i ] ;
  }
  int num = ( avg * ( n + k ) ) - sum ;
  int den = k ;
  if ( num % den != 0 ) return - 1 ;
  return ( int ) ( num / den ) ;
}

static int findMissing ( int arr [ ] , int n , int k , int avg ) { int sum = 0 ; for ( int i = 0 ; i < n ; i ++ ) { sum += arr [ i ] ; } int num = ( avg * ( n + k ) ) - sum ; int den = k ; if ( num % den != 0 ) return - 1 ; return ( int ) ( num / den ) ; }
(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)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (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 (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))))) right: (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) consequence: (return_statement (unary_expression operand: (decimal_integer_literal)))) (return_statement (cast_expression type: (integral_type) value: (parenthesized_expression (binary_expression left: (identifier) right: (identifier)))))))