Submission #73436

#	Time	Username	Problem	Language	Result	Execution time	Memory
73436		jiaqing23	Toys (CEOI18_toy)	C++14	79 / 100	5020 ms	3896 KiB

toy

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define pop pop_back
#define fbo find_by_order
#define ook order_of_key

typedef long long ll;
typedef pair<ll,ll> pi;
typedef vector<ll> vi;
typedef long double ld;
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<ll>::iterator sit;
typedef map<ll,ll>::iterator mit;
typedef pair<int,pair<int,int> > tri;

set<ll> ans;
ll n;
vector<ll> fac;
vector<ll> factor_tem, factor;
ll sum = 0;

void factorize(ll n, ll now, ll smallfac){
    if(now == n) ans.insert(sum);

    for(int i = smallfac; factor[i]*now <= n ; i++){
        if((n/now) % factor[i] == 0){
            fac.pb(factor[i]);
            sum+=(factor[i]-1);
            factorize(n, now*factor[i], i);
            sum-=(factor[i]-1);
            fac.pop();
        }
    }
}

int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0);

    cin >> n;


    for(int i = 1; i * i <= n; i++){
        if(n%i==0) {
            factor_tem.pb(i);
            if(i*i!=n)factor_tem.pb(n/i);
        }
    }
    int k = factor_tem.size();
    factor.resize(k+5);
    for(int i = 0; i < k/2; i++){
        factor[i] = factor_tem[2*i];
        factor[k-i-1] = factor_tem[2*i+1];
    }
    if(k%2==1) factor[k/2] = factor_tem[k-1];
    factor[k] = (ll)1e10;
    //for(auto i: factor) cout<<i<<' ';

    factorize(n, 1, 1);

    cout<<ans.size()<<endl;

    for(set<ll>::iterator it = ans.begin(); it!=ans.end(); it++){
        cout<<*it<<' ';
    }
	return 0;
}

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