Submission #412910

#	Time	Username	Problem	Language	Result	Execution time	Memory
412910		Tc14	The short shank; Redemption (BOI21_prison)	C++17	15 / 100	2079 ms	8140 KiB

prison

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ve vector
typedef long long ll;
typedef pair<int, int> pii;
const int INF = 1e9 + 10;

int main() {

    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    int n, d, t;
    ve<int> T;
    ve<ve<int>> DP;

    cin >> n >> d >> t;
    T = ve<int>(n);
    DP = ve<ve<int>>(d + 1, ve<int>(n, INF));

    for (int i = 0; i < n; i++) {
        cin >> T[i];
    }

    DP[0][n - 1] = 0;

    for (int i = 1; i <= d; i++) {
        for (int j = n - 2; j >= 0; j--) {

            int z = INF;
            int cnt = 0;
            for (int k = j + 1; k < n; k++) {

                if (T[k] <= t || z <= t) cnt++;
                z = min(z, T[k]);
                z++;

                DP[i][j] = min(DP[i][j], DP[i - 1][k] + cnt);
            }
        }
    }

    int ans = INF;
    int z = INF;
    int cnt = 0;
    for (int i = 0; i < n; i++) {

        if (T[i] <= t || z <= t) cnt++;
        z = min(z, T[i]);
        z++;

        ans = min(ans, DP[d][i] + cnt);
    }
    cout << ans << endl;

    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 10
• Subtask 5: 0 / 25
• Subtask 6: 0 / 20