Submission #95510

#	Time	Username	Problem	Language	Result	Execution time	Memory
95510		fedoseevtimofey	Split the sequence (APIO14_sequence)	C++14	28 / 100	2044 ms	24824 KiB

sequence

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0); cout.setf(ios::fixed); cout.precision(20);
    #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
    int n, k;
    cin >> n >> k;
    vector <int> a(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }
    vector <vector <ll>> dp(n + 1, vector <ll> (k + 1));
    vector <ll> pref(n + 1);
    for (int i = 0; i < n; ++i) {
        pref[i + 1] = pref[i] + a[i];
    }
    vector <vector <int>> who(n + 1, vector <int> (k + 1, -1));
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= k; ++j) {
            for (int t = 0; t < n; ++t) {
                if ((pref[i] - pref[t]) * (pref[n] - pref[i]) + dp[t][j - 1] > dp[i][j]) {
                    dp[i][j] = (pref[i] - pref[t]) * (pref[n] - pref[i]) + dp[t][j - 1];
                    who[i][j] = t;
                }
            }
        }
    }
    ll ans = 0;
    int id = -1;
    for (int i = 0; i <= n; ++i) {
        if (dp[i][k] > ans) {
            ans = dp[i][k];
            id = i;
        }
    }
    vector <int> where;
    for (int cr = k; cr >= 1; --cr) {
        where.push_back(id);
        id = who[id][cr];
    }
    reverse(where.begin(), where.end());
    cout << ans << '\n';
    for (auto x : where) {
        cout << x << ' ';
    }
}

• Subtask 1: 0 / 11
• Subtask 2: 11 / 11
• Subtask 3: 0 / 11
• Subtask 4: 17 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29