How many squares
Time Limit : 1 Second
Memory Limit : 128 MB
Submission: 948
Solved: 336
 Description
 You are give a grid of N*M(1< N, M <1000). And your job is to calculate how many different squares can be found in this gird.
 Input
 For each test case, given a line of 2 integers, N and M.
 Output
 One integer in a line, the number of squares can be found.
 sample input

3 3
 sample output

14
 hint
 source
 Liruqi