p03597 AtCoder Beginner Contest 074 - 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
```python
N = int(input()) ** 2
A = int(input())
print(str(N - A))
```