Codechef problem in understanding

#1

https://www.codechef.com/COW42020/problems/COW3E/

Please can you help me in understanding the problem.Iam having some probelm on how the output is coming.

#2

In the sample input, the given matrix is -
1 2 3
1 1 0
4 -2 2

2 modifications are there.
First is 2 0 0 1 1 which means we add 2 to each element of the rectangle whose diagonal corners are: (0,0) and (1,1). Resulting matrix -
3 4 3
3 3 0
4 -2 2

Second is -1 1 0 2 2 which means we add -1 to each element of the rectangle whose diagonal corners are: (1,0) and (2,2). Resulting matrix -
3 4 3
2 2 -1
3 -3 1

Now we have two queries.
First is 0 0 0 1 which means we have to display the sum of elements in the rectangle represented by the corners: (0,0) and (0,1).
Answer = 3 + 4 = 7

Second is 1 1 2 2 which means we have to display the sum of elements in the rectangle represented by the corners: (1,1) and (2,2).
Answer = 2 + (-1) + (-3) + 1 = -1

So the output is -
7
-1

#3

Thank un.understood very well

#4

Welcome. Please mark this doubt as resolved now.

#5

can u share "Please rate your experience " link

#6

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