Submission #766343

#	Time	Username	Problem	Language	Result	Execution time	Memory
766343		linkret	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	153 ms	4320 KiB

sculpture

#include "bits/stdc++.h"

using namespace std;

typedef long long ll;

const int N = 2020;

int n, a, b;
ll mask = (1ll << 61) - 1;
ll arr[N];
bool dp[N][N];
ll dp1[N];

/*
6 1 3
8 1 2 1 5 4
*/

void solve() {
    for (ll bit = 60; bit >= 0; bit--) {
        mask ^= (1ll << bit);

        memset(dp, 0, sizeof dp);
        dp[0][0] = 1;

        for (int i = 1; i <= n; i++)
            for (int cnt = 1; cnt <= n; cnt++) {
                ll sum = 0;
                for (int j = i; j >= 1; j--) {
                    sum += arr[j];
                    if ((sum | mask) == mask)
                        dp[i][cnt] |= dp[j - 1][cnt - 1];
                }
            }

        bool ok = false;
        for (int i = a; i <= b; i++)
            ok |= dp[n][i];

        if (!ok)
            mask ^= (1ll << bit);
    }
}

void solve_1() {
    for (ll bit = 60; bit >= 0; bit--) {
        mask ^= (1ll << bit);

        for (int i = 1; i <= n; i++) {
            dp1[i] = 1e9;
            ll sum = 0;
            for (int j = i; j >= 1; j--) {
                sum += arr[j];
                if ((sum | mask) == mask)
                    dp1[i] = min(dp1[i], 1 + dp1[j - 1]);
            }
        }

        if (dp1[n] > b)
            mask ^= (1ll << bit);
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> n >> a >> b;

    for (ll i = 1; i <= n; i++)
        cin >> arr[i];

    if (a == 1)
        solve_1();
    else
        solve();

    cout << mask << endl;

    return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 21 / 21
• Subtask 4: 25 / 25
• Subtask 5: 29 / 29