Submission #705100

#	Time	Username	Problem	Language	Result	Execution time	Memory
705100		bebra	Bali Sculptures (APIO15_sculpture)	C++17	21 / 100	6 ms	1128 KiB

sculpture

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

#define dbg(x) cerr << #x << ": " << x << endl;

const int MAX_N = 2000 + 5;
const int MAX_X = 20;
const int INF = 1e9;
int a[MAX_N];
int dp[MAX_N][MAX_N];

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

    int n, l, r;
    cin >> n >> l >> r;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i];
    }
    // minimize (a1 + a2 + ... + a_(k - 1)) | (a_k + a_(k + 1) + ...) | ... 
    // IMPORTANT NOTE: IN LAST GROUP n = 2000 and l = 1
    // maybe greedy bit by bit? minimize first, then second, ...
    for (int i = 0; i <= n; ++i) {
        for (int j = 0; j < MAX_N; ++j) {
            dp[i][j] = INF;
        }
    }
    dp[0][0] = 0;
    for (int i = 1; i <= n; ++i) {
        int s = 0;
        for (int j = i; j > 0; --j) {
            s += a[j];
            for (int x = 0; x <= j * MAX_X + 5; ++x) {
                dp[i][s | x] = min(dp[i][s | x], dp[j - 1][x] + 1);
            }
        }
    }

    int ans = INF;
    for (int x = 0; x < MAX_N; ++x) {
        if (dp[n][x] <= r) {
            ans = min(ans, x);
        }
    }
    cout << ans << '\n';


    return 0;
}

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

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