There is a m*n grade given. Find the number of rectangles in the grid. Remember, a square is also a rectangle.
Please change the function call in the test suite to your_fcn_name(m,n) instead of your_fcn_name(x).
Please check the test cases. x???
Triangle Numbers Below N
How many jokers?
How many ways to write a number
Choose group with people
How many ways to write
odd number odd sum
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