Submission #1133834

#	Time	Username	Problem	Language	Result	Execution time	Memory
1133834		dombly	Rice Hub (IOI11_ricehub)	C++20	100 / 100	12 ms	1552 KiB

ricehub

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

using namespace std;

int besthub(int n, int len, int* a, long long b) {
  vector<long long> pref(n);
  for (int i = 0; i < n; i++) {
    if (i == 0) {
      pref[i] = a[i];
    } else {
      pref[i] = pref[i - 1] + a[i];
    }
  }
  auto Can = [&](int l, int r) {
    int mid = l + r >> 1;
    long long ll = (long long) a[mid] * (mid - l + 1) - (pref[mid] - (l == 0 ? 0LL: pref[l - 1]));
    long long rr = pref[r] - pref[mid] - (long long) a[mid] * (r - mid);
    return ll + rr <= b;
  };
  int ans = 1;
  for (int i = 0; i < n; i++) {
    int bot = i, top = n - 1, mx = 0;
    while (bot <= top) {
      int mid = bot + top >> 1;
      if (Can(i, mid)) {
        mx = mid - i + 1;
        bot = mid + 1;
      } else {
        top = mid - 1;
      }
    }
    ans = max(ans, mx);
  }
  return ans;
}

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