Submission #538006

#	Time	Username	Problem	Language	Result	Execution time	Memory
538006		kym	Toys (CEOI18_toy)	C++14	79 / 100	1990 ms	262144 KiB

toy

#include <bits/stdc++.h>
using namespace std;
#define FOR(i,s,e) for(ll i = s; i <= (ll)e; ++i)
#define DEC(i,s,e) for(ll i = s; i >= (ll)e; --i)
#define IAMSPEED ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
#define db(x) cerr << #x << "=" << x << "\n"
#define db2(x, y) cerr << #x << "=" << x << " , " << #y << "=" << y << "\n"
#define db3(a,b,c) cerr<<#a<<"="<<a<<","<<#b<<"="<<b<<","<<#c<<"="<<c<<"\n"
#define dbv(v) cerr << #v << ":"; for (auto ite : v) cerr << ite << ' '; cerr <<"\n"
#define dbvp(v) cerr << #v << ":"; for (auto ite : v) cerr << "{"  << ite.f << ',' << ite.s << "} "; cerr << "\n"
#define dba(a,ss,ee) cerr << #a << ":"; FOR(ite,ss,ee) cerr << a[ite] << ' '; cerr << "\n"
#define reach cerr << "LINE: " << __LINE__ << "\n";
#else
#define db(x)
#define db2(x,y)
#define db3(a,b,c)
#define dbv(v)
#define dbvp(v)
#define dba(a,ss,ee)
#define reach 
#endif
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define ll long long 
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define f first
#define s second
#define g0(x) get<0>(x)
#define g1(x) get<1>(x)
#define g2(x) get<2>(x)
#define g3(x) get<3>(x)
typedef pair <ll, ll> pi;
typedef tuple<ll,ll,ll> ti3;
typedef tuple<ll,ll,ll,ll> ti4;
ll rand(ll a, ll b) { return a + rng() % (b-a+1); }
const int MOD = 1e9 + 7;
const int inf = (int)1e9 + 500;
const long long oo = (ll)1e18 + 500;
template <typename T> void chmax(T& a, const T b) { a=max(a,b); }
template <typename T> void chmin(T& a, const T b) { a=min(a,b); }
const int MAXN = -1;
int n;
set<vector<int> > B[40];
vector<int> factors;
vector<int> primeList;
bool isPrime(long long N) {
    if (N <= 1) return 0;
    if (N <= 3) return N > 0; // Only 2 is prime.
    else if ((N % 2 == 0) || (N % 3 == 0)) return false;
    int i = 5;
    while ((i * i) <= N){
        if ((N % i == 0) || ((N % (i + 2)) == 0)) return false;
        i += 6;
    }
    return true;
}
vector<int> primeFactorize(int X) {
    vector<int> result;
    for (auto it = primeList.begin(); it != primeList.end(); ++it) {
        if (*it > X/(*it)) break; 
        while (X % *it == 0) { 
            X /= *it; 
            result.push_back(*it);
        }
    }
    if (X != 1) result.push_back(X); //The last factor above sqrt(X)
    return result;
}
int32_t main() 
{
	IAMSPEED
	cin >> n;
	if(n==1)return cout << "1\n0",0;
	FOR(i,2,sqrt(n) + 1)if(isPrime(i))primeList.pb(i);
	factors = primeFactorize(n);
	vector<int> initial; initial.pb(factors[0]);
	B[0].insert(initial);
	bool alt = 0;
	FOR(i,1,factors.size()-1) {
		alt = 1-alt;
		for(auto ss:B[1-alt]) { //this set
			for(auto &x: ss) { 
				int rx = x;
				int y = factors[i] * x;
				x = y;
				vector<int> ns = ss;
				sort(all(ns));
				B[alt].insert(ns);
				x = rx;
			}
			vector<int> ns = ss;
			ns.pb(factors[i]);
			sort(all(ns));
			B[alt].insert(ns);
		}
		B[1-alt].clear();
	}
	set<int> os;
	for(auto grp:B[alt]) {
		int out = 0;
		for(auto x:grp)out+=x-1;
		os.insert(out);
	}
	cout << os.size() << '\n';
	for(auto i:os)cout<<i<<' ';

}

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