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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. const int MAXN = 1e5 + 7;
  5. ll a[MAXN], pre[MAXN], n, k, lim, t, ans;
  6.  
  7. bool check(ll x){
  8.     for(int i = 1; i <= n; i++) if(k * pre[n] - (x * pre[n] + pre[i]) >= lim){
  9.         ans = x * n + i + 1;
  10.         return 1;
  11.     }
  12.     return 0;
  13. }
  14.  
  15.  
  16. int main(){
  17.     ios_base::sync_with_stdio(0);
  18.     cout.tie(0);
  19.     cin.tie(0);
  20.     cin >> t;
  21.     while(t--){
  22.         cin >> n >> k >> lim;
  23.         for(int i = 1; i <= n; i++){
  24.             cin >> a[i];
  25.             pre[i] = pre[i - 1] + a[i];
  26.         }
  27.         ll L = 0, R = k - 1;
  28.         ans = 0;
  29.         while(L <= R){
  30.             int mid = (L + R) / 2;
  31.             if(check(mid))R = mid - 1;
  32.             else L = mid + 1;
  33.         }
  34.         cout << ans<< endl;
  35.     }
  36. }
Success #stdin #stdout 0.01s 5284KB
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https://ideone.com/TRvjwd
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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