Submission #103411

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
103411	2019-03-30 07:27:29	wxh010910	Rice Hub (IOI11_ricehub)	C++17	100 / 100	29 ms	2560 KiB

ricehub

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#include <bits/stdc++.h>
#include "ricehub.h"
using namespace std;
int besthub(int R, int L, int X[], long long B) {
  vector<long long> pref(R + 1);
  for (int i = 0; i < R; ++i) {
    pref[i + 1] = pref[i] + X[i];
  }
  auto check = [&](int len) {
    for (int l = 0, r = len; r <= R; ++l, ++r) {
      int m = (l + r) >> 1;
      if ((long long) (m - l) * X[m] - (pref[m] - pref[l]) + (pref[r] - pref[m]) - (long long) (r - m) * X[m] <= B) {
        return true;
      }
    }
    return false;
  };
  int l = 0, r = R;
  while (l < r) {
    int mid = (l + r + 1) >> 1;
    if (check(mid)) {
      l = mid;
    } else {
      r = mid - 1;
    }
  }
  return l;
}
 
 
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• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32