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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.     bool kt = false;
  9.     for(int i = 0; i <= n; i++) if(k * pre[n] - (x * pre[n] + pre[i]) >= lim){
  10.         ans = x * n + i + 1;
  11.         kt = 1;
  12.     }
  13.     if(kt) return 1;
  14.     return 0;
  15. }
  16.  
  17.  
  18. int main(){
  19.     ios_base::sync_with_stdio(0);
  20.     cout.tie(0);
  21.     cin.tie(0);
  22.     cin >> t;
  23.     while(t--){
  24.         cin >> n >> k >> lim;
  25.         for(int i = 1; i <= n; i++){
  26.             cin >> a[i];
  27.             pre[i] = pre[i - 1] + a[i];
  28.         }
  29.         ll L = 0, R = k - 1;
  30.         ans = 0;
  31.         while(L <= R){
  32.             int mid = (L + R) / 2;
  33.             if(check(mid))L = mid + 1;
  34.             else R = mid - 1;
  35.         }
  36.         cout << ans << endl;
  37.         for(int i = 1; i <= n; i++) pre[i] = a[i] = 0;
  38.     }
  39. }
Success #stdin #stdout 0.01s 5292KB
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https://ideone.com/6KiVdW
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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