Bullet Speed

Time limit0.5sMemory limit256 MB

Summary

Given Cheolsu's running speed A and the bullet's speed B relative to him, print the bullet's speed toward the target, which is A + B.

Level: Easy2 of 10
Topics: Math, Implementation
Solved: No attempts yet

Problem

Cheolsu is running toward a target at $A$ meters per second, carrying a gun. While running, he fires a bullet toward the target; the bullet leaves the gun at $B$ meters per second relative to him.

How many meters per second is the bullet traveling toward the target?

Input

The first line gives two real numbers $A$ and $B$ , separated by a space and written to two decimal places. ( $0 < A, B \le 10^8$ )

Output

Print how many meters per second the bullet is traveling toward the target.

A result is judged correct if its absolute or relative error from the answer is at most $10^{-9}$ .

Examples1

Example 1
Input
```
1.23 4.56
```
Expected output
```
5.79
```