Submission #648431

#	Time	Username	Problem	Language	Result	Execution time	Memory
648431		ymm	Toys (CEOI18_toy)	C++17	100 / 100	3069 ms	90188 KiB

toy

#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;

set<int> solve(int n)
{
	static map<int, set<int>> mem;
	if (n == 1)
		return {0};
	if (mem.count(n))
		return mem[n];
	set<int> ans;
	for (int x = 2; x*x <= n; ++x) {
		if (n%x)
			continue;
		for (int y : solve(x))
			ans.insert(y+n/x-1);
		for (int y : solve(n/x))
			ans.insert(y+x-1);
	}
	ans.insert(n-1);
	mem[n] = ans;
	return ans;
}

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	int n;
	cin >> n;
	auto ans = solve(n);
	cout << ans.size() << '\n';
	for (int x : ans)
		cout << x << ' ';
	cout << '\n';
}

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