Submission #1226846

#	Time	Username	Problem	Language	Result	Execution time	Memory
1226846		Malix	Toys (CEOI18_toy)	C++20	39 / 100	5093 ms	56332 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<ll,int> mp;
map<int,vi> fac;

int solve(int x,int y){
    ll a=((ll)x*(ll)n)+(ll)y;
    if(y+1==x)return 2;
    if(y<=0||x<=1)return 1;
    if(mp[a]!=0)return mp[a];
    if(fac[x].empty()){
        int k=sqrt(x)+1;
        REP(i,2,k)if(x%i==0){
            fac[x].PB(i);
            if(i*i!=x)fac[x].PB(x/i);
        }
    }
    mp[a]=1;
    for(auto u:fac[x])if(solve(x/u,y-u+1)==2)mp[a]=2;
    return mp[a];
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin>>n;
    if(n==1){
        cout<<1<<"\n"<<0;
        return 0;
    }
    vi b;
    REP(i,1,n)if(solve(n,i)==2)b.PB(i);
    cout<<b.size()<<"\n";
    for(auto u:b)cout<<u<<" ";
}

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