Submission #162162

#	Time	Username	Problem	Language	Result	Execution time	Memory
162162		kostia244	Split the sequence (APIO14_sequence)	C++14	0 / 100	15 ms	6648 KiB

sequence

//#pragma comment(linker, "/stack:200000000")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#include<bits/extc++.h>
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define pb push_back
using namespace std;
using namespace __gnu_pbds;
using ll = long long;
using vi = vector<ll>;
using vvi = vector<vector<ll>>;
const ll mod = 998244353;
using oset = tree<pair<int, int>, null_type, less<pair<int, int>>, rb_tree_tag, tree_order_statistics_node_update>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MK = 220, MN = 1e5 + 3;
ll n, a[MN], pref[MN], dp[MK][MN], p[MK][MN];
ll f(ll l, ll r, ll i) {
	ll a = pref[i] - pref[l - 1];
	ll b = pref[r] - pref[i];
	return a * b;
}
void bt(int a, int b) {
	if (b > n)
		exit(-1);
	cout << b << " ";
	if (a > 1)
		bt(a - 1, p[a][b]);
}
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	ll k;
	cin >> n >> k;
	for (int i = 1; i <= n; i++)
		cin >> a[i], pref[i] = pref[i - 1] + a[i];
	ll ans = 0, g = n - 1;
	for (int a = 1; a <= k; a++) {
		int j =1;
		for (int i = 1; i < n; i++) {
			while(j+1 <= i && (dp[a - 1][j - 1] + f(j, n, i)) < (dp[a - 1][j] + f(j+1, n, i)))
				j++;
			dp[a][i] = dp[a - 1][j - 1] + f(j, n, i);
			p[a][i] = j - 1;
			ans = max(ans, dp[a][i]);
			if (ans == dp[a][i])
				g = i;
		}
	}

	cout << ans << '\n';
	bt(k, g);
}

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