Submission #1077140

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077140		juicy	Rice Hub (IOI11_ricehub)	C++17	100 / 100	17 ms	4444 KiB

ricehub

#include "ricehub.h"

#include <bits/stdc++.h>

int besthub(int n, int L, int *a, long long b) {
  std::vector<long long> pf(n);
  for (int i = 0; i < n; ++i) {
    pf[i] = (i ? pf[i - 1] : 0LL) + a[i];
  }
  auto qry = [&](int l, int r) {
    int md = (l + r) / 2;
    return (md - l + 1) * a[md] - pf[md] + (l ? pf[l - 1] : 0LL) + pf[r] - pf[md] - (r - md) * a[md]; 
  };
  int res = 0;
  for (int i = 0, j = 0; i < n; ++i) {
    while (qry(j, i) > b) {
      ++j;
    }
    res = std::max(res, i - j + 1);
  }
  return res;
}

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