Submission #1216055

#	Time	Username	Problem	Language	Result	Execution time	Memory
1216055		nikaa123	Toys (CEOI18_toy)	C++20	100 / 100	397 ms	4456 KiB

toy

//Nikoloz Kochashvili
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define eb emplace_back
#define mp make_pair
#define pb push_back
#define pp pop_back
#define endl '\n'
#define ff first
#define ss second
#define stop exit(0)
#define sz(x) (int)x.size()
#define pause system("pause")
#define all(x) (x).begin(), (x).end()
#define deb(x) cout << #x << "-" << x << endl

typedef char chr;
typedef string str;
typedef long long ll;
typedef vector<int> vii;
typedef pair<int, int> pii;

const long long INF = LLONG_MAX;
const int inf = INT_MAX;
const int mod = 998244353;
const int MOD = 1e9 + 7;
const int dx[] = {0, 0, -1, 1};
const int dy[] = {-1, 1, 0, 0};
const double PI = 2 * acos(0.0);

const int N = 2e5 + 5;

int n;
set <int> ans;

void solve(int x, int sum, int last) {
    // cout <<x << " " << sum << " " << last << endl;
    if (x == 1) {
        ans.insert(sum);
        return;
    }
    for (int i = 2; (i * i <= x) && (i <= last); i++) {
        if (x % i != 0) continue;
        if (i <= last) solve(x / i, sum + i - 1, i);
        int j = x / i;
        if (j != i && j <= last) solve(x / j, sum + j - 1, j);
    }
    if (x <= last) solve(1,sum+x-1,x);
}

inline void test_case() {
    
    cin >> n;
    solve(n,0,inf);
    cout << sz(ans) << endl;
    for (auto it:ans) {
        cout << it << " ";
    }
    cout << endl;
    
}

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

    srand(chrono::steady_clock::now().time_since_epoch().count());
    mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

    int T = 1;
    // cin >> T;
    while (T--) {
        test_case();
    }

    return 0;
}

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