Submission #770654

#	Time	Username	Problem	Language	Result	Execution time	Memory
770654		OrazB	Split the sequence (APIO14_sequence)	C++17	0 / 100	11 ms	2420 KiB

sequence

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less<int>, rb_tree_tag,
             tree_order_statistics_node_update>
    ordered_set;
//Dijkstra->set
//set.find_by_order(x) x-position value
//set.order_of_key(x) number of strictly less elements don't need *set.??
#define N 100005
#define wr cout << "Continue debugging\n";
#define all(x) (x).begin(), (x).end()
#define ll long long int
#define pii pair <int, int>
#define pb push_back
#define ff first
#define ss second

const ll INF = 1e18;
int n, k;

int main ()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> n >> k;
	vector<ll>a(n+1), pref(n+1, 0);
	for (int i = 1; i <= n; i++){
		cin >> a[i];
		pref[i] = pref[i-1]+a[i];	
	}
	vector<int> vec;
	ll sum = 0;
	set<pii> s = {{1, n}};
	while(k--){
		ll mx = 0, l2 = 0, r2 = 0, idx = 0;
		for (auto z : s){
			ll x = 0, y = 0, mn = INF;
			int l = z.ff, r = z.ss, pos = 0;
			while(l <= r){
				int md = (l+r)/2;
				ll A = pref[md]-pref[z.ff-1], B = pref[z.ss]-pref[md];
				if (mn > abs(A-B)){
					mn = abs(A-B);
					x = A; y = B;
					pos = md;
				}
				(A>B ? r=md-1 : l=md+1);
			}
			if (mx < x*y){
				mx = x*y;
				l2 = z.ff;
				r2 = z.ss;
				idx = pos;
			}
		}
		sum += mx;
		s.erase({l2, r2});
		if (l2 != idx) s.insert({l2, idx});
		if (r2 != idx) s.insert({idx+1, r2});
		vec.pb(idx);
	}
	cout << sum << '\n';
	for (auto i : vec) cout << i << " ";
}	

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