Submission #876344

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
876344	2023-11-21 15:10:03	Kanon	Counting Mushrooms (IOI20_mushrooms)	C++14	92.62 / 100	5 ms	808 KiB

mushrooms

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#include <bits/stdc++.h>
#include "mushrooms.h"
 
using namespace std;
 
const int magic = 84;
const int bound = 226;
 
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
// generate random number between l, r : uniform_int_distribution<long long>(l, r)(rng)
// random shuffle : shuffle(.begin(), .end(), rng)
 
int count_mushrooms(int n) {
 
  if (n <= bound + 1) {
    int ret = 1;
    for (int i = 1; i < n; i++) {
      ret += use_machine({0, i}) ^ 1;
    }
    return ret;
  }
 
  vector<int> a(n, -1);
  a[0] = 0;
 
  vector<int> order(magic);
  iota(order.begin(), order.end(), 1);
  shuffle(order.begin(), order.end(), rng);
  int cnt = magic + 1;
 
 
 
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• Subtask 1: 92.623 / 100