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Number of Connected Computers.

Moderate
0/80
Average time to solve is 10m
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Problem statement

You have been given a grid ‘ARR’ of size ‘N' * M’. ‘ARR[i][j]’ is ‘1’ if the computer is present at position ‘(i,j)’ otherwise it is zero. A computer is said to be a connected computer if there is a computer in its row or column other than itself. Your task is to return the number of connected computers.

Example:

subsequence

Let’s say you have a grid [[1,0],[1,1]]. We can say the computer ‘ARR[0][0]’ is a connected computer because there is a computer in its column other than itself. We can say the computer ‘arr[1][0]’ is a connected computer because there is a computer in its row and column other than itself. We can say the computer ‘arr[1][1]’ is a connected computer because there is a computer in its row other than itself. Therefore the number of connected computers is 3.
Detailed explanation ( Input/output format, Notes, Images )
Constraints:
1 <= T <= 10
1 <= N <= 100
1 <= M <= 100
‘ARR[i][j]’ = 0 or 1

Where ‘ARR[i][j]’ is an element of grid ‘ARR’.  

Time Limit: 1 sec
Sample Input 1:
2
4 4
1 1 0 0
0 0 1 0
0 0 0 1
0 0 0 1
2 2
1 0
1 1 
Sample Output 1:
4
3
Explanation for Sample Output 1:
In test case 1, The computer ‘ARR[0][0]’ is a connected computer because there is a computer in its row other than itself. The computer ‘ARR[0][1]’ is a connected computer because there is a computer in its row other than itself. The computer ‘ARR[1][2]’ is not a connected computer because there is no computer in its row and column other than itself. The computer ‘ARR[3][2]’ is a connected computer because there is a computer in its column other than itself. The computer ‘ARR[3][3]’ is a connected computer because there is a computer in its column other than itself.

Therefore the answer is 4.

In test case 2, The computer ‘ARR[0][0]’ is a connected computer because there is a computer in its column other than itself. The computer ‘ARR[1][0]’ is a connected computer because there is a computer in its row and column other than itself. The computer ‘ARR[1][1]’ is a connected computer because there is a computer in its row other than itself. 

Therefore the answer is 3.
Sample Input 2:
2
2 2
1 0
0 1 
2 2
1 1
1 1
Sample Output 2:
0
4
Explanation for Sample Output 2:
In test case 1, The computer ‘ARR[0][0]’ is not a connected computer because there is no computer in its row and column other than itself. Also The computer ‘ARR[1][1]’ is not a connected computer because there is no computer in its row and column other than itself.

Therefore the answer is 0.

In test case 2, All the four computers are connected computers as each computer has other computer in its row and colum both.

Therefore the answer is 4.
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