You are given 2 points with integer coordinates $A(x_1, y_1), B(x_2, y_2)$ on Descartes plane. Print their distance.
### Input
- 4 integers $x_1, y_1, x_2, y_2$.
### Output
- Distance between point $A$ and $B$, rounded to 2 decimal places.
### Constraints
- $(1 \le x_1, y_1, x_2, y_2 \le 1000)$.
### Example
Input:
```1 1 2 2```
Output:
```1.41```
