1 test case failing

#1

My one test case is failing pls help

#2

Input:
10
1 1 1 1 1 1 1 1 1 1
0 0 1 1 1 1 1 0 0 0
0 0 0 0 1 1 0 0 0 0
0 1 1 0 0 0 0 0 0 0
0 1 1 1 1 1 1 0 0 0
0 0 0 0 1 1 0 0 0 0
0 0 0 0 0 0 1 1 1 0
0 0 0 0 0 0 0 1 1 0
0 1 1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 1 1
Correct ans: 17
your ans:18
Try to debug for this