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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define fi first
  4. #define se second
  5. #define ll long long
  6. #define pll pair<ll,ll>
  7. #define pb push_back
  8. #define emb emplace_back
  9. #define lg(x) __lg(x)
  10. #define all(s) s.begin(),s.end()
  11. #define name "bai1"
  12. #define Mask(i) (1LL<<i)
  13. #define testbit(mask, i) ((mask >> i) & 1LL)
  14. #define onBit(mask, i) (mask | (1LL << i))
  15. #define offBit(mask, i) (mask & ~(1LL << i))
  16. #define flipBit(mask, i) (mask ^ (1LL << i))
  17. #define showbit(mask, x) bitset<x>(mask)
  18. const ll mod = 1e9 + 7;
  19.  
  20. void add(ll &a, ll b){
  21.      if((a += b) >= mod) a -= mod;
  22. }
  23.  
  24.  
  25. const ll inf = 1e9;
  26. const ll lim = 1e7 + 5;
  27. const ll N = 1e5 + 5;
  28.  
  29.  
  30. ll n, k;
  31. ll a[N];
  32.  
  33. bool check(ll x){
  34.      int drone = 1;
  35.      ll sum = 0;
  36.      for(int i = 1; i <= n; i++){
  37.           sum += a[i];
  38.           if(sum <= x) continue;
  39.           else{
  40.                sum = a[i];
  41.                drone++;
  42.           }
  43.      }
  44.      return drone <= k;
  45. }
  46. int main()
  47. {
  48.      ios_base::sync_with_stdio(0);
  49.      cout.tie(0);cin.tie(0);
  50.      if(fopen(name".inp","r")){
  51.           freopen(name".inp","r",stdin);
  52.           freopen(name".out","w",stdout);
  53.      }
  54.  
  55.      cin >> n >> k;
  56.      ll X = 0;
  57.      for(int i = 1; i <= n; i++){
  58.           cin >> a[i];
  59.           X += a[i];
  60.      }
  61.      ll l = 0, r = X, mid, res;
  62.      while(l <= r){
  63.           mid = (l + r) >> 1;
  64.           if(check(mid)){
  65.                r = mid - 1;
  66.                res = mid;
  67.           }
  68.           else l = mid + 1;
  69.      }
  70.      cout << res;
  71. }
  72.  
  73.  
  74.  
  75.  
  76.  
  77.  
  78.  
  79.  
  80.  
Success #stdin #stdout 0.01s 5300KB
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https://ideone.com/IweRMH
language:
C++14 (clang 8.0)
created:
9 hours ago
visibility:
public

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