Submission #930568

#	Time	Username	Problem	Language	Result	Execution time	Memory
930568		Regulus	Toys (CEOI18_toy)	C++17	59 / 100	5062 ms	1220 KiB

toy

#include <bits/stdc++.h>
#define IO ios::sync_with_stdio(false);cin.tie(0);
#define debug(x) cerr << #x << " = " << (x) << ' '
#define bug(x) cerr << (x) << ' '
#define endl cerr << '\n'
#define all(v) (v).begin(), (v).end()
#define SZ(v) (ll)(v).size()
#define lowbit(x) (x)&-(x)
#define pb emplace_back
#define F first
#define S second
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
//#define TEST
int sum = 0;
set<int> st;

inline void dfs(int x, int lim)
{
    int m = sqrt(x);
    for (int i=lim; i <= m; ++i)
    {
        if (x / i < lim) break;
        if (x % i) continue;
        sum += i - 1;
        dfs(x / i, lim);
        sum -= i - 1;
    }
    st.insert(sum + x - 1);
}

int main(void)
{ IO
    int n, i;

    cin >> n;
    int m = sqrt(n);
    for (i=2; i <= m; ++i)
    {
        if (n % i) continue;
        sum = i - 1;
        dfs(n / i, i);
    }
    st.insert(n - 1);

    cout << SZ(st) << '\n';
    for (int x : st) cout << x << ' ';
    cout << '\n';

    return 0;
}

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