Submission #537177

#	Time	Username	Problem	Language	Result	Execution time	Memory
537177		Lobo	Split the sequence (APIO14_sequence)	C++17	0 / 100	10 ms	1844 KiB

sequence

#include<bits/stdc++.h>
using namespace std;

const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

#define maxn 110000

int n, k, a[maxn], ps[maxn];

int sum(int l, int r) {
    return ps[r] - ps[l-1];
}

void solve() {
    cin >> n >> k;
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
        ps[i] = ps[i-1] + a[i];
    }

    pair<int,int> mx = mp(-inf,0);
    for(int i = 1; i < n; i++) {
        mx = max(mx,mp(sum(1,i)*sum(i+1,n),i));
        // cout << i << " " << sum(1,i) << " " << sum(i+1,n) << endl;
    }

    priority_queue<pair<pair<int,int>,pair<int,int>>> pq;
    int ans = 0;
    vector<int> ansv;
    pq.push(mp(mx,mp(1,n)));

    while(k--) {
        int val = pq.top().fr.fr;
        int id = pq.top().fr.sc;
        int l = pq.top().sc.fr;
        int r = pq.top().sc.sc;
        pq.pop();

        // cout << l << " " << r << " " << id << " " << val << endl;

        ans+= val;
        ansv.pb(id);

        int l1 = l;
        int r1 = id;

        if(r1-l1+1 > 1) {
            pair<int,int> mx = mp(-inf,0);
            for(int i = l1; i < r1; i++) {
                mx = max(mx,mp(sum(l1,i)*sum(i+1,r1),i));
            }

            pq.push(mp(mx,mp(l1,r1)));
        }

        l1 = id+1;
        r1 = r;

        if(r1-l1+1 > 1) {
            pair<int,int> mx = mp(-inf,0);
            for(int i = l1; i < r1; i++) {
                mx = max(mx,mp(sum(l1,i)*sum(i+1,r1),i));
            }

            pq.push(mp(mx,mp(l1,r1)));
        }
    }

    cout << ans << endl;
    for(auto x : ansv) {
        cout << x << " ";
    }
    cout << endl;


}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);

    int tt = 1;
    // cin >> tt;
    while(tt--) solve();

}

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