Submission #1094995

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094995		alexander707070	Toys (CEOI18_toy)	C++14	0 / 100	24 ms	55900 KiB

toy

#include<bits/stdc++.h>
#define MAXN 1007
using namespace std;

int n;
vector<int> dels;

unordered_set<int> sums[MAXN][MAXN];

unordered_map<int,int> pos;

unordered_set<int> ans;

unordered_set<int> ff(int d,int mins){
	if(mins>d)return {dels[d]-1};
	if(dels[d]%dels[mins]!=0)return ff(d,mins+1);

	if(!sums[d][mins].empty())return sums[d][mins];

	sums[d][mins] = ff(d,mins+1);
	unordered_set<int> s=ff(pos[dels[d]/dels[mins]],mins);

	for(int i:s){
		sums[d][mins].insert(i+dels[mins]-1);
	}

	return sums[d][mins];
}

int main(){

	cin>>n;
	for(int i=1;i*i<=n;i++){
		if(n%i!=0)continue;

		dels.push_back(i);
		if(i!=n/i)dels.push_back(n/i);
	}

	sort(dels.begin(),dels.end());

	for(int i=0;i<dels.size();i++){
		pos[dels[i]]=i;
	}
	
	ans=ff(dels.size()-1,1);

	cout<<ans.size()<<"\n";
	for(int i:ans){
		cout<<i<<" ";
	}
	cout<<"\n";

    return 0;
}

Compilation message (stderr)

toy.cpp: In function 'int main()':
toy.cpp:42:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |  for(int i=0;i<dels.size();i++){
      |              ~^~~~~~~~~~~~

• Subtask 1: 0 / 19
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 21