Bichrome Cells

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.

Examples

Input

3 4

Output

5

Input

19 100

Output

261

Input

10 0

Output

100

inputFormat

Inputs

Input is given from Standard Input in the following format:

N A

outputFormat

Outputs

Print the number of squares that will be painted black.

Examples

Input

3 4

Output

5

Input

19 100

Output

261

Input

10 0

Output

100

样例

3
4

5