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Count all possible paths from top left to bottom right
Easy Accuracy: 14.36% Submissions: 160 Points: 2

The task is to count all the possible paths from top left to bottom right of a m X n matrix with the constraints that from each cell you can either move only to right or down.

Example 1:

Input: m = 2, n = 2
Output: 2 
Explanation: Two possible ways are
RD and DR.


Example 2:

Input: m = 3, R = 3
Output: 6
Explanation: Six possible ways are
RRDD, DDRR, RDDR, DRRD, RDRD, DRDR.


Your Task:  
You dont need to read input or print anything. Complete the function numberOfPaths() which takes m and n as input parameter and returns count all the possible paths.The answer may be very large, compute the answer modulo 109 + 7.


Expected Time Complexity: O(m*n)
Expected Auxiliary Space: O(m*n)

Constraints:
1 <= m <=100
1 <= n <=100

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Count all possible paths from top left to bottom right

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