static int findElement ( int arr [ ] , int size ) {
  int right_mul = 1 , left_mul = 1 ;
  for ( int i = 1 ;
  i < size ;
  i ++ ) right_mul *= arr [ i ] ;
  for ( int i = 0 , j = 1 ;
  j < size ;
  i ++ , j ++ ) {
    right_mul /= arr [ j ] ;
    left_mul *= arr [ i ] ;
    if ( left_mul == right_mul ) return arr [ i + 1 ] ;
  }
  return - 1 ;
}

static int findElement ( int arr [ ] , int size ) { int right_mul = 1 , left_mul = 1 ; for ( int i = 1 ; i < size ; i ++ ) right_mul *= arr [ i ] ; for ( int i = 0 , j = 1 ; j < size ; i ++ , j ++ ) { right_mul /= arr [ j ] ; left_mul *= arr [ i ] ; if ( left_mul == right_mul ) return arr [ i + 1 ] ; } return - 1 ; }
(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))) 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))) (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: (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (return_statement (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))))) (return_statement (unary_expression operand: (decimal_integer_literal)))))