fork download
copy 
  1. #include <bits/stdc++.h> 
  2. using namespace std;  
  3.  
  4. typedef long long ll;  
  5. typedef pair<int, int> ii;  
  6.  
  7. const int INF = 1e9;  
  8. const ll LINF = 1e18;  
  9.  
  10. const int N = 2e5 + 5; 
  11.  
  12. int n, k;  
  13. int x[N]; 
  14.  
  15. bool check(ll mx) {
  16. 	for (int i = 1; i <= n; i++) {
  17. 		if (x[i] > mx) return false; 
  18. 	}
  19.  
  20. 	ll sum = 0, cnt = 1;  
  21. 	for (int i = 1; i <= n; i++) {
  22. 		if (sum + x[i] > mx) {
  23. 			cnt++; 
  24. 			sum = x[i]; 
  25. 		}
  26. 		else {
  27. 			sum += x[i]; 
  28. 		}
  29. 	}
  30.  
  31. 	return (cnt <= k); 
  32. }
  33.  
  34. int main() {
  35. 	ios::sync_with_stdio(0); cin.tie(0);  	
  36. 	cin >> n >> k;  
  37. 	for (int i = 1; i <= n; i++) cin >> x[i]; 
  38.  
  39. 	ll l = 1, r = 2e14, ans = -1; 
  40. 	while (l <= r) {
  41. 		ll mid = (l + r) >> 1; 
  42.  
  43. 		if (check(mid)) {
  44. 			ans = mid;  
  45. 			r = mid - 1; 
  46. 		}
  47. 		else {
  48. 			l = mid + 1; 
  49. 		}
  50. 	} 
  51.  
  52. 	cout << ans << '\n'; 
  53. }
Success #stdin #stdout 0.01s 5268KB
comments (?)
stdin
copy 
5 3
2 4 7 3 5
stdout
copy 
8
https://ideone.com/Zn7DmP
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!