Submission #1324618

#	Time	Username	Problem	Language	Result	Execution time	Memory
1324618		fateless	Bali Sculptures (APIO15_sculpture)	C++20	0 / 100	20 ms	32040 KiB

sculpture

// #pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
using namespace std;

#define speedup cin.tie(0)->sync_with_stdio(0)
#define all(x) begin(x), end(x)
#define int long long
#define pb push_back
#define arr array
#define vc vector

const int N = 2e3 + 10;
static int dp[N][N];
inline void solve () {
    int n, l, r; 
    cin >> n >> l >> r;
    vc <int> a(n + 1, 0);
    for (int i = 1; i <= n; i++) cin >> a[i];
    int lgm = __lg(*max_element(all(a))), ans = (1 << (lgm + 1)) - 1;

    auto good = [&](int mask) -> int {
        memset(dp, 0, sizeof(dp));
        for (int i = 0; i <= r; i++) dp[i][0] = 1;

        for (int j = 1; j <= r; j++) {
            for (int i = 1; i <= n; i++) {
                int sum = 0;
                for (int k = i; k >= 1; k--) {
                    sum += a[k];
                    if ((sum & ans) == sum && dp[j - 1][k - 1]) {
                        dp[j][i] = 1;
                        break;
                    }
                }
            }
            if (dp[j][n] && l <= j && j <= r) return 1;
        }
        return 0;
    };

    for (int bit = lgm; bit >= 0; bit--) {
        ans ^= (1 << bit);
        if (!good(ans)) ans ^= (1 << bit);
    }

    cout << ans << '\n';
}

signed main() {
    speedup;
    solve();

    return 0;   
}

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

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 21
• Subtask 4: 0 / 25
• Subtask 5: 0 / 29