Problem A. Attacking rooks ≡

 Input file: Standard input Time limit: 1 sec Output file: Standard output Memory limit: 512 Mb

Statement

A pawn is located on a chess board at coordinates x, y (x is a column number, y is a row number).

You must write a program to determine maximum number of rooks which can be placed on this board so that not a one of them will attack another.

Input format

Input contains integers x and y.

Output format

Output must contain a single integer — maximum number of rooks.

1 ≤ x, y ≤ 8

Sample tests

No. Standard input Standard output
1
1 1
8

0.219s 0.117s 13