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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.  
  26.  
  27.  
  28. bool isPossible(int n, int k, int mid){
  29.     int ct = 1;
  30.     int sum = 0;
  31.     for(int i=0; i<n; i++){
  32.         if(mid < a[i]) return false;
  33.         if(sum + a[i] > mid){
  34.             sum = a[i];
  35.             ct++;
  36.         }
  37.         else{
  38.             sum += a[i];
  39.         }
  40.     }
  41.     if(ct <= k) return true;
  42.     return false;
  43. }
  44.  
  45. int consistency(int n, int k){
  46.  
  47.     int s = 0, e = LINF;
  48.     int ans = LINF;
  49.     while(s<=e){
  50.         int mid = s+(e-s)/2;
  51.         if(isPossible(n, k, mid)){
  52.             ans = min(ans, mid);
  53.             e = mid-1;
  54.         }
  55.         else s = mid+1;
  56.     }
  57.  
  58.     return ans;
  59.  
  60. }
  61.  
  62. void solve() {
  63.  
  64.     int n, k;
  65.     cin>>n >> k;
  66.  
  67.     a.resize(n);
  68.  
  69.     for(int i=0; i<n; i++) cin >> a[i];
  70.     cout << consistency(n, k) << endl;
  71.  
  72.  
  73. }
  74.  
  75.  
  76.  
  77.  
  78.  
  79. int32_t main() {
  80.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  81.  
  82.     int t = 1;
  83.     // cin >> t;
  84.     while (t--) {
  85.         solve();
  86.     }
  87.  
  88.     return 0;
  89. }
Success #stdin #stdout 0.01s 5296KB
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https://ideone.com/m5B9MT
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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