Submission #920498

#	Time	Username	Problem	Language	Result	Execution time	Memory
920498		aykhn	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	117 ms	600 KiB

sculpture

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define inf 0x3F3F3F3F

const int mod = 1e9 + 7;
const int MXN = 2e3 + 5;

int n, A, B;
int a[MXN];

int _1()
{
    int x = 0, y = (1LL << 61) - 1;
    for (int b = 60; b >= 0; b--)
    {
        vector<int> dp(n + 1, inf);
        dp[0] = 0;
        x |= (1LL << b);
        for (int i = 1; i <= n; i++)
        {
            int s = 0;
            for (int j = i; j >= 1; j--)
            {
                s += a[j];
                if ((s & x)) continue;
                dp[i] = min(dp[i], dp[j - 1] + 1);
            }
        }
        if (dp[n] > B) x ^= (1LL << b);
    }
    return y - x;
}

int _2()
{
    int x = 0, y = (1LL << 61) - 1;
    for (int b = 60; b >= 0; b--)
    {
        vector<vector<int>> dp(n + 1, vector<int> (n + 1, 0));
        dp[0][0] = 1;
        x |= (1LL << b);
        for (int i = 1; i <= n; i++)
        {
            for (int j = 1; j <= n; j++)
            {
                int s = 0;
                for (int k = j; k >= 1; k--)
                {
                    s += a[k];
                    if ((s & x)) continue;
                    dp[i][j] |= dp[i - 1][k - 1];
                }
            }
        }
        int f = 0;
        for (int i = A; i <= B; i++) f |= dp[i][n];
        if (!f) x ^= (1LL << b);
    }
    return y - x;
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> A >> B;
    for (int i = 1; i <= n; i++) cin >> a[i];
    cout << (A == 1 ? _1() : _2()) << '\n';
}

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