Submission #856703

#	Time	Username	Problem	Language	Result	Execution time	Memory
856703		a_l_i_r_e_z_a	Split the sequence (APIO14_sequence)	C++14	28 / 100	6 ms	6744 KiB

sequence

// Be name Khoda
// Khodaya khodet komak kon
// Hope is last to die

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

typedef long long ll;
typedef pair<ll, ll> pll;

#define pb push_back
#define S second
#define F first
#define mp make_pair
#define smax(x, y) (x) = max((x), (y))
#define smin(x, y) (x) = min((x), (y))
#define all(x) (x).begin(), (x).end()
#define set_dec(x) cout << fixed << setprecision(x);
#define kill(x) cout << x << endl, exit(0)
#define sz(x) ((int)(x).size())
#define file_io freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);

const ll maxN = 4000 + 10, inf = 1e18 + 7;
ll sm[maxN], dp[2][maxN];
ll O[210][maxN];

void divide(ll k, ll l, ll r, ll optl, ll optr, ll amirG){
    if(r - l < 0) return;
    ll mid = (l + r) / 2, op = 0;
    dp[k][mid] = -inf;
    for(int i = optl; i <= optr; i++){
        ll res = dp[1 - k][i] + sm[i] * (sm[mid] - sm[i]);
        if(res >= dp[k][mid]) dp[k][mid] = res, op = i;
    }
    O[amirG][mid] = op;
    divide(k, l, mid - 1, optl, op, amirG);
    divide(k, mid + 1, r, op, optr, amirG);
}

void f(ll pos, ll k){
    if(k == 0) return;
    f(O[k - 1][pos], k - 1);
    cout << pos << " ";
}

int32_t main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    ll n, k; cin >> n >> k;
    for(int i = 0; i < n; i++){
        ll x; cin >> x;
        sm[i + 1] = sm[i] + x;
    }
    for(int i = 1; i <= k; i++) divide(i % 2, 1, n, 0, n, i);
    cout << dp[k % 2][n] << '\n';

    f(O[k][n], k);

    return 0;
}

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