2318: K-City
[Creator : ]
Description
Time Limit: 2 sec / Memory Limit: 256 MB
Score : 100100 points
Problem Statement
In K-city, there are nn streets running east-west, and mm streets running north-south. Each street running east-west and each street running north-south cross each other. We will call the smallest area that is surrounded by four streets a block. How many blocks there are in K-city?Constraints
- 2 ≤ n, m ≤ 1002≤n,m≤100
Input
Input is given from Standard Input in the following format:nnmm
Output
Print the number of blocks in K-city.Sample Input Copy
3 4
Sample Output Copy
6
HINT
There are six blocks, as shown below:
