Submission #1309823

#	Time	Username	Problem	Language	Result	Execution time	Memory
1309823		empyr1n	Kpart (eJOI21_kpart)	C++20	30 / 100	2096 ms	221624 KiB

Main

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

#include <bits/stdc++.h>

#define ll long long
#define pb push_back
#define el '\n'

using namespace std;

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

    ll tt; cin >> tt;
    while (tt--) {
        ll n; cin >> n;
        vector <ll> a(n + 1), pr(n + 1, 0);

        for (ll i = 1; i <= n; i++) {
            cin >> a[i];
            pr[i] = pr[i - 1] + a[i];
        }

        vector <vector<ll>> dp(n + 1, vector <ll> (5e4 + 1, 0));

        for (ll i = 1; i <= n; i++) {
            for (ll j = 1; j <= 5e4; j++) {
                dp[i][j] = dp[i - 1][j];
                if (j == a[i])
                    dp[i][j] = max(i, dp[i][j]);
                if (j - a[i] >= 0)
                    dp[i][j] = max(dp[i][j], dp[i - 1][j - a[i]]);
            }
        }

        vector <ll> ans;
        for (ll k = 2; k <= n; k++) {
            bool ok = 1;
            for (ll i = k; i <= n; i++) {
                if ((pr[i] - pr[i - k]) & 1 || dp[i][(pr[i] - pr[i - k]) / 2] < i - k + 1) {
                    ok = 0;
                    break ;
                }
            }

            if (ok)
                ans.pb(k);
        }

        cout << ans.size() << ' ';
        for (ll v : ans)
            cout << v << ' ';
        cout << el;
    }
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 70