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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6. inline int power(int a, int b) {
  7.     int x = 1;
  8.     while (b) {
  9.         if (b & 1) x *= a;
  10.         a *= a;
  11.         b >>= 1;
  12.     }
  13.     return x;
  14. }
  15.  
  16.  
  17. const int M = 1000000007;
  18. const int N = 3e5+9;
  19. const int INF = 2e9+1;
  20. const int LINF = 2000000000000000001;
  21.  
  22. //_ ***************************** START Below *******************************
  23.  
  24. vector<int> a;
  25. bool isPossible(int n, int k, int mid){
  26. 	int sum = 0;
  27. 	int ct = 1;
  28. 	for(int i=0; i<n; i++){
  29. 		if(a[i] > mid) return false;
  30. 		if(sum + a[i] <= mid){
  31. 			sum += a[i];
  32. 		}
  33. 		else{
  34. 			sum = a[i];
  35. 			ct++;
  36. 		}
  37. 	}
  38. 	return ct <= k;
  39. }
  40.  
  41. int consistency(int n, int k){
  42.  
  43. 	int s = 0, e = INF;
  44. 	while(s<e){
  45. 		int mid = s + (e-s)/2;
  46. 		if(isPossible(n, k, mid)){
  47. 			e = mid;
  48. 		}
  49. 		else s = mid+1;
  50. 	}
  51.  
  52. 	return e;
  53.  
  54. }
  55.  
  56. void solve() {
  57.  
  58.     int n, k;
  59.     cin>>n >> k;
  60.  
  61.     a.resize(n);
  62.  
  63.     for(int i=0; i<n; i++) cin >> a[i];
  64.     cout << consistency(n, k) << endl;
  65.  
  66.  
  67. }
  68.  
  69.  
  70.  
  71.  
  72.  
  73. int32_t main() {
  74.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  75.  
  76.     int t = 1;
  77.     // cin >> t;
  78.     while (t--) {
  79.         solve();
  80.     }
  81.  
  82.     return 0;
  83. }
Success #stdin #stdout 0s 5324KB
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https://ideone.com/jhLi9B
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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