Submission #850113

#	Time	Username	Problem	Language	Result	Execution time	Memory
850113		treap_enjoyer	Split the sequence (APIO14_sequence)	C++14	50 / 100	2035 ms	24408 KiB

sequence

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#pragma GCC optimize("Ofast,unroll-loops")

#define ll long long
#define all(x) x.begin(), x.end()

using namespace std;
using namespace __gnu_pbds;

template<class T> using oset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

const ll INF = 1e18;
const int MAXN = 1e5 + 5;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    //ifstream cin("input.txt");
    //ofstream cout("output.txt");
    int n, k;
    cin >> n >> k;
    vector<ll> a(n + 1);
    for(int i = 1; i <= n; i++){
        cin >> a[i];
    }
    vector<vector<ll> > dp(k + 2, vector<ll>(n + 2, -INF));
    vector<vector<int> > p(k + 2, vector<int>(n + 2, 0));
    dp[0][0] = 0;
    vector<ll> pref(n + 2, 0);
    for(int i = 1; i <= n; i++){
        pref[i] += pref[i - 1];
        pref[i] += a[i];
    }
    for(int i = 1; i <= k + 1; i++){
        for(int j = 1; j <= n; j++){
            for(int k = 0; k < j; k++){
                if(dp[i][j] < dp[i - 1][k] + (pref[j] - pref[k]) * pref[k]){
                    dp[i][j] = dp[i - 1][k] + (pref[j] - pref[k]) * pref[k];
                    p[i][j] = k;
                }
            }
        }
    }
    vector<int> ans;
    int cur = n;
    for(int i = k; i > 0; i--){
        ans.push_back(p[i + 1][cur]);
        cur = p[i + 1][cur];
    }
    cout << dp[k + 1][n] << endl;
    reverse(all(ans));
    for(auto i: ans){
        cout << i << " ";
    }
}

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