Submission #1243614

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243614		CrabCNH	Kpart (eJOI21_kpart)	C++20	100 / 100	1225 ms	900 KiB

Main

#include <bits/stdc++.h>

using namespace std;

const int maxN = 1e3 + 5;
const int inf = 1e9 + 7;

int a[maxN];
int pfs[maxN];

void solve () {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i ++) {
        cin >> a[i];
        pfs[i] = pfs[i - 1] + a[i];
    }
    int lim = pfs[n];
    vector <int> dp (lim + 1, 0LL); // vi tri xa nhat ma tao duoc tong i bat dau
    vector <bool> ok (lim + 1, true);
    for (int i = 1; i <= n; i ++) {
        for (int s = lim; s >= a[i]; s --) {
            dp[s] = max (dp[s], dp[s - a[i]]);
        }
        dp[a[i]] = max (dp[a[i]], i);
        for (int j = 1; j <= i; j ++) {
            if ((pfs[i] - pfs[j - 1]) % 2) {
                ok[i - j + 1] = false;
            }
            else if (dp[(pfs[i] - pfs[j - 1]) / 2] < j) {
                //cout << dp[(pfs[i] - pfs[j - 1]) / 2] << ' ' << i << ' ' << j << '\n';
                ok[i - j + 1] = false;
            }
        }
    }
    vector <int> res;
    for (int i = 1; i <= n; i ++) {
        if (ok[i]) {
            res.push_back (i);
        }
    }
    cout << res.size () << ' ';
    for (auto it : res) {
        cout << it << ' ';
    }
    cout << '\n';
}

signed main () {
    ios_base :: sync_with_stdio (0);
    cin.tie (0);
    int testCase = 1;
    cin >> testCase;
    while (testCase --) {
        solve ();
    }
    return 0;
}

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