Question
What changes should be made to the Kadane’s algorithm so that it produces the right output even when all array elements are negative?
Change 1 = Line 10: int sum = arr[0], ans = arr[0]
Change 2 = Line 13: sum = max_num(arr[idx],sum+arr[idx])
1. #include<stdio.h>
2. int max_num(int a, int b)
3. {
4. if(a > b)
5. return a;
6. return b;
7. }
8. int kadane_algo(int *arr, int len)
9. {
10. int ans = 0, sum = 0, idx;
11. for(idx =0; idx < len; idx++)
12. {
13. sum = max_num(0,sum + arr[idx]);
14. ans = max_num(sum,ans);
15. }
16. return ans;
17. }
18. int main()
19. {
20. int arr[] = {-2, -3, -3, -1, -2, -1, -5, -3},len = 8;
21. int ans = kadane_algo(arr,len);
22. printf("%d",ans);
23. return 0;
24. }
a.
Only Change 1 is sufficient
b.
Only Change 2 is sufficient
c.
Both Change 1 and Change 2 are necessary
d.
None of the mentioned
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Q. Consider the following implementation of Kadane’s algorithm. What changes should be made to the Kadane’s algorithm so that it produces the right output even when all array...
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