Submission #1226852

#	Time	Username	Problem	Language	Result	Execution time	Memory
1226852		Malix	Toys (CEOI18_toy)	C++20	79 / 100	5093 ms	63296 KiB

toy

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> ti;
typedef vector<ll> li;
typedef vector<li> lii;
 
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define LSOne(s) ((s)&(-s))
#define all(x) (x).begin(),(x).end()
 
ll INF=1000000000000000010;
int inf=1e9+10;
ll M=1e9+7;

int n;
map<pi,bool> mp;
map<int,vi> fac;
set<int> ans;

void solve(int x,int y){
    if(mp[{x,y}])return;
    mp[{x,y}]=1;
    if(x==1){
        ans.insert(y);
        return;
    }
    if(fac[x].empty()){
        int k=sqrt(x)+1;
        REP(i,1,k)if(x%i==0){
            fac[x].PB(i);
            if(i*i!=x)fac[x].PB(x/i);
        }
    }
    for(auto u:fac[x])solve(x/u,y+u-1);
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin>>n;
    if(n==1){
        cout<<1<<"\n"<<0;
        return 0;
    }
    solve(n,0);
    cout<<ans.size()<<"\n";
    for(auto u:ans)cout<<u<<" ";
}

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