# Crne

Thrilled about his new valid set of pieces, Mirko rushed over to Slavko’s, to find that Slavko too found a set of chess pieces in his attic. Slavko’s set, miraculously, contains only black pieces. But since neither of them can play chess, they settled on smashing one another senseless with their chessboards.

While Slavko is warming up with a series of stretches, Mirko
decided to sabotage Slavko’s chessboard. An expert in carving
wood, he decided to cut Slavko’s chessboard so that it shatters
into *as many pieces as possible* when Slavko attempts
to hit Mirko.

Mirko can only make *horizontal and vertical cuts*
(parallel to the sides to the board), edge to edge, and has
time to make *at most $N$ cuts*.

## Input

The first line of input contains an integer $N$ ($1 \le N \le 10^9$), the number of cuts Mirko can make.

## Output

Output the largest number of pieces Slavko’s chessboard can crash into.

Sample Input 1 | Sample Output 1 |
---|---|

1 |
2 |

Sample Input 2 | Sample Output 2 |
---|---|

3 |
6 |