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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define int long long int
  4. #define endl 	"\n"
  5.  
  6. int solve(int *arr, int n, int time) {
  7. 	int painters = 1;
  8. 	int init = arr[0];
  9. 	for (int i = 1; i < n; i++) {
  10. 		if (init + arr[i] > time) {
  11. 			init = arr[i];
  12. 			painters++;
  13. 		} else if (init + arr[i] == time) {
  14. 			init = 0;
  15. 			painters++;
  16. 		} else
  17. 			init += arr[i];
  18. 	}
  19. 	return painters;
  20. }
  21.  
  22. int32_t main()
  23. {	ios_base::sync_with_stdio(false);
  24. 	cin.tie(NULL);
  25.  
  26. 	int K, n;
  27. 	cin >> K >> n;
  28. 	int *arr = new int[n];
  29. 	int mx = INT_MIN, sum = 0;
  30. 	for (int i = 0; i < n; i++) {
  31. 		cin >> arr[i];
  32. 		sum += arr[i];
  33. 		mx = max(mx, arr[i]);
  34. 	}
  35.  
  36. 	//Search space.
  37. 	int s = mx, e = sum, ans = INT_MAX;
  38. 	while (s <= e) {
  39. 		int mid = (s + e) / 2;
  40. 		int painters = solve(arr, n, mid);
  41.  
  42. 		if (painters <= K) { //Valid, find min time.
  43. 			ans = min(mid, ans);
  44. 			e = mid - 1;
  45. 		} else
  46. 			s = mid + 1;
  47. 	}
  48. 	cout << ans;
  49. 	return 0;
  50. }
Success #stdin #stdout 0s 4532KB
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https://ideone.com/AO3KnF
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
secret

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