Submission #942959

#	Time	Username	Problem	Language	Result	Execution time	Memory
942959		viwlesxq	Toys (CEOI18_toy)	C++17	100 / 100	2319 ms	73880 KiB

toy

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(), x.end()
#define size(x) (int)x.size()

template<class S, class T>
bool chmin(S &a, const T &b) {
  return a > b ? (a = b) == b : false;
}
template<class S, class T>
bool chmax(S &a, const T &b) {
  return a < b ? (a = b) == b : false;
}
const int N = 1e5;

unordered_map<int, unordered_map<int, bool>> vis;
int sum = 0;

void solve(int n) {
  sum += n - 1;
  vis[sum][n] = true;
  sum -= n - 1;
  for (int d = 2; d * d <= n; ++d) {
    if (n % d == 0) {
      sum += d - 1;
      if (!vis[sum + n / d - 1][n / d]) solve(n / d);
      sum -= d - 1;
    }
  }
}

signed main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int n; cin >> n;
  solve(n);
  vector<int> res;
  for (auto [i, j] : vis) {
    res.push_back(i);
  }
  sort(all(res));
  cout << size(res) << '\n';
  for (auto i : res) cout << i << ' ';
}

• Subtask 1: 19 / 19
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 21 / 21