Submission #661464

#	Time	Username	Problem	Language	Result	Execution time	Memory
661464		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) {
  int ans = 1 + (n % 2 == 0 ? 1 - use_machine({0, n - 1}) : 0);
  vector<int> segments;
  int cnt = 0;
  for (int i = 2; i < n; i += 2, cnt += 2) {
    const vector<int> foo = {i - 1, 0, i};
    if (segments.size() + foo.size() > n) {
      ans += cnt - use_machine(segments);
      cnt = 0;
      segments.clear();
    }
    segments.insert(segments.end(), foo.begin(), foo.end());

  }
  if (segments.size() >= 3) ans += cnt - use_machine(segments);
  return ans;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:23:38: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   23 |     if (segments.size() + foo.size() > n) {
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~

• Subtask 1: 0 / 100