Submission #661460

#	Time	Username	Problem	Language	Result	Execution time	Memory
661460		evenvalue	Counting Mushrooms (IOI20_mushrooms)	C++17	0 / 100	0 ms	208 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;

template<typename T>
using min_heap = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using max_heap = priority_queue<T, vector<T>, less<T>>;

using int64 = long long;
using ld = long double;

constexpr int kInf = 1e9 + 10;
constexpr int64 kInf64 = 1e15 + 10;
constexpr int kMod = 1e9 + 7;

int count_mushrooms(int n) {
  if (n == 2) {
    return 2 - use_machine({0, 1});
  }
  vector<int> segments;
  for (int i = 2; i < n; i += 2) {
    const vector<int> foo = {i - 1, 0, i};
    segments.insert(segments.end(), foo.begin(), foo.end());
  }
  int ans = 1 + (n % 2 == 0 ? 1 - use_machine({0, n - 1}) : 0);
  ans += ((n % 2 == 0) ? n - 2 : n - 1) - use_machine(segments);
  return ans;
}

• Subtask 1: 0 / 100