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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. #define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
  5. int n,k;
  6. vector<ll>a;
  7. bool check(ll x){
  8.     int c=1;
  9.     ll s=0;
  10.     for(int i=0;i<n;i++){
  11.         s+=a[i];
  12.         if(s>x){
  13.             c++;
  14.             s=a[i];
  15.         }
  16.     }
  17.     return c<=k;
  18. }
  19. int main(){
  20.     fast;
  21.     cin>>n>>k;
  22.     a.resize(n);
  23.     ll l=0,r=0;
  24.     for(int i=0;i<n;i++){
  25.         cin>>a[i];
  26.         l=max(l,a[i]);
  27.         r+=a[i];
  28.     }
  29.     ll ans=r;
  30.     while(l<=r){
  31.         ll mid=l+(r-l)/2;
  32.         if(check(mid)){
  33.             ans=mid;
  34.             r=mid-1;
  35.         }else{
  36.             l=mid+1;
  37.         }
  38.     }
  39.     cout<<ans;
  40.     return 0;
  41. }
Success #stdin #stdout 0s 5296KB
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https://ideone.com/ywa6iK
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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