Submission #543539

#	Time	Username	Problem	Language	Result	Execution time	Memory
543539		Olympia	Split the sequence (APIO14_sequence)	C++17	0 / 100	2090 ms	5076 KiB

sequence

#include <vector>
#include <algorithm>
#include <iostream>
#include <set>
#include <cmath>
#include <map>
#include <random>
#include <cassert>
#include <ctime>
#include <cstdlib>
#include <queue>
#include <limits.h>

using namespace std;
int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n, k;
    cin >> n >> k;
    int64_t arr[n]; int64_t pref[n + 1]; pref[0] = 0;
    for (int i = 0; i < n; i++) {
        cin >> arr[i];
        pref[i + 1] = pref[i] + arr[i];
    }
    if (k == 0) {
        cout << 0;
        return 0;
    }
    int64_t dp[n - 1][k + 1];
    for (int i = 0; i < n - 1; i++) {
        //[0 ... i] [i + 1  ... n - 1]
        dp[i][1] = (pref[i + 1]) * (pref[n] - pref[i + 1]);
    }
    for (int j = 2; j <= k; j++) {
        for (int i = 0; i < n - 1; i++) {
            dp[i][j] = 0;
            for (int prev = 0; prev < i; prev++) {
                dp[i][j] = max(dp[i][j], dp[prev][j - 1] + (pref[i + 1] - pref[prev + 1]) * (pref[n] - pref[i + 1]));
            }
        }
    }
    int64_t myMax = 0;
    for (int i = 0; i < n; i++) {
        //cout << dp[i][k] << '\n';
        myMax = max(myMax, dp[i][k]);
    }
    cout << myMax << '\n';
}

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