Astronomy
Description
It is known that any star cannot be simultaneously visible both from the south pole and from the north pole. Using this, the Penguin and the Bear decided to count all the stars in space. They stood at the poles at the same time, and each counted the stars that are visible to him. You know these two numbers. Using these data, answer the question: how many stars are there in space?
The two input lines contain the numbers $A$ and $B$ $(1 \leq A,B < 10^{10^5})$ - the number of stars counted by the Penguin and the Bear. These integers don't contain leading zeros.
Output one number - the answer to the problem. This number must not contain leading zeros.
Input
The two input lines contain the numbers $A$ and $B$ $(1 \leq A,B < 10^{10^5})$ - the number of stars counted by the Penguin and the Bear. These integers don't contain leading zeros.
Output
Output one number - the answer to the problem. This number must not contain leading zeros.
705
33
738