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  1. #include <iostream>
  2. #include <fstream>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. 	ifstream cin("rsq.in");
  8. 	ofstream cout("rsq.out");
  9. 	ios::sync_with_stdio(false);
  10. 	unsigned int n, m, i;
  11. 	long long sum = 0, sum_k;
  12. 	int *a, x, y;
  13. 	bool t;
  14. 	cin >> n >> m; n++;
  15. 	a = new int[n];
  16. 	for (i = 1; i < n; i++)
  17. 	{
  18. 		cin >> a[i];
  19. 		sum += a[i];
  20. 	}
  21. 	const unsigned int ndiv2 = n/2;
  22. 	while (m--)
  23. 	{
  24. 		cin >> t >> x;
  25. 		if (t)
  26. 		{
  27. 			sum -= a[x];
  28. 			cin >> a[x];
  29. 			sum += a[x];
  30. 		}
  31. 		else
  32. 		{
  33. 			cin >> y;
  34. 			y++;
  35. 			if (y - x > ndiv2)
  36. 			{
  37. 				sum_k = sum;
  38. 				for (i = 1; i < x; i++)
  39. 				{
  40. 					sum_k -= a[i];
  41. 				}
  42. 				for (i = y; i < n; i++)
  43. 				{
  44. 					sum_k -= a[i];
  45. 				}
  46. 			}
  47. 			else
  48. 			{
  49. 				sum_k = 0;
  50. 				for (; x < y; x++)
  51. 				{
  52. 					sum_k += a[x];
  53. 				}
  54. 			}
  55. 			cout << sum_k << endl;
  56. 		}
  57. 	}
  58. 	return 0;
  59. }
Success #stdin #stdout 0s 16064KB
comments (?)
stdin
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5 3
1 2 3 4 5
0 1 5
1 1 -14
0 1 5
stdout
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15
0
https://ideone.com/p2mHN1
Looksery. Fenwik: A
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
secret

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