Submission #231919

#	Time	Username	Problem	Language	Result	Execution time	Memory
231919		IOrtroiii	Rice Hub (IOI11_ricehub)	C++14	100 / 100	23 ms	2560 KiB

ricehub

#ifndef KienVu
#include "ricehub.h"
#endif
#include <bits/stdc++.h>

using namespace std;

using ll = long long;

int besthub(int R, int L, int X[], ll B) {
   vector<ll> pref(R + 1);
   for (int i = 0; i < R; ++i) pref[i + 1] = pref[i] + X[i];
   auto cost = [&](int l, int r) {
      int md = (l + r) >> 1;
      return ll(md + 1 - l) * X[md] - (pref[md + 1] - pref[l]) - ll(r - md) * X[md] + (pref[r + 1] - pref[md + 1]);
   };
   int ans = 0;
   int r = 0;
   for (int l = 0; l < R; ++l) {
      while (r + 1 < R && cost(l, r + 1) <= B) r++;
      ans = max(ans, r - l + 1);
   }
   return ans;
}

#ifdef KienVu
int main() {
   int R, L, B;
   while (cin >> R >> L >> B) {
      int X[R];
      for (int i = 0; i < R; ++i) cin >> X[i];
      cout << besthub(R, L, X, B) << "\n";
   }
}
#endif // KienVu

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32