Submission #536823

#	Time	Username	Problem	Language	Result	Execution time	Memory
536823		maomao90	Toys (CEOI18_toy)	C++17	100 / 100	2644 ms	59996 KiB

toy

// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define MP make_pair
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
#define MT make_tuple
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

#define INF 1000000005
#define LINF 1000000000000000005ll
#define MAXN 200005

struct Hash {
    static uint64_t splitmix64(uint64_t x) {
        // http://xorshift.di.unimi.it/splitmix64.c
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(ii x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64((x.FI + FIXED_RANDOM) << 1) ^ splitmix64(x.SE + FIXED_RANDOM);
    }
};

int n;
set<int> st;

unordered_set<ii, Hash> vis;
void dp(int n, int cur) {
    if (vis.find(MP(n, cur)) != vis.end()) return;
    for (int i = 2; i * i <= n; i++) {
        if (n % i == 0) {
            dp(n / i, cur + i - 1);
            if (i * i == n) break;
        }
    }
    st.insert(cur + n - 1);
    vis.insert(MP(n, cur));
}

int main() {
#ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
#endif
    cin >> n;
    dp(n, 0);
    cout << st.size() << '\n';
    for (int i : st) {
        cout << i << ' ';
    }
    cout << '\n';
    return 0;
}

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