Submission #990976

#	Time	Username	Problem	Language	Result	Execution time	Memory
990976		starchan	Toys (CEOI18_toy)	C++17	100 / 100	1678 ms	86852 KiB

toy

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define in array<int, 2>
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define MX (int)3e5+5
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)

map<int, set<int>> crazy;

map<int, bool> vis;

void solve(int u)
{
	if(vis[u])
		return;
	vis[u] = 1;
	if(u == 1)
	{
		crazy[u].insert(0);
		return;
	}
	vector<int> d;
	for(int i = 2; i*i <= u; i++)
	{
		if(u%i)
			continue;
		int j = u/i;
		d.pb(i); solve(i); if(j != i){ d.pb(j); solve(j); }
	}
	for(auto x: d)
	{
		for(auto vv: crazy[x])
			crazy[u].insert(vv+(u/x)-1);
	}
	crazy[u].insert(u-1);
	return;
}

signed main()
{
	fast();
	int n;
	cin >> n; solve(n);
	cout << crazy[n].size() << "\n";
	for(auto tt: crazy[n])
		cout << tt << " ";
	cout << "\n";
	return 0;
}	

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