We have an $N \times N$ square grid.
We will paint each square in the grid either black or white.
If we paint exactly A squares white, how many squares will be painted black?

-----Constraints-----
- $1 \leq N \leq 100$
- $0 \leq A \leq N^2$

-----Inputs-----
Input is given from Standard Input in the following format:
N
A

-----Outputs-----
Print the number of squares that will be painted black.

-----Sample Input-----
3
4

-----Sample Output-----
5

There are nine squares in $a 3 \times 3$ square grid.
Four of them will be painted white, so the remaining five squares will be painted black.

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