Find jth element in ith row of a Pascal Triangle

In a pascal triangle starting from top to bottom, tell the **element at $ith$ row and at $jth$ position** in it. ### Input - First line will contain $T$, number of testcases. Then the testcases follow. - Each testcase contains of a single line of input, two integers $I, J$. ### Output For each testcase, in a new line, print the $ith$ row $jth$ element of Pascal Triangle for each test case in a n