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you can avoid writing the long sequence of additions the following way:
1) create a variable called total equal to arr[i+1][j+1]
2) create a third loop of k in range(3).
3) On each iteration of k, add arr[i][j+k] and arr[i+2][j+k] to total.
4) append total to k
2D Array - DS
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you can avoid writing the long sequence of additions the following way:
1) create a variable called total equal to arr[i+1][j+1]
2) create a third loop of k in range(3). 3) On each iteration of k, add arr[i][j+k] and arr[i+2][j+k] to total. 4) append total to k