Submission #1022454

#	Time	Username	Problem	Language	Result	Execution time	Memory
1022454		lmToT27	Holding (COCI20_holding)	C++14	110 / 110	18 ms	25148 KiB

holding

#include <bits/stdc++.h>
#define all(dataStructure) dataStructure.begin(),dataStructure.end()
#define ll long long

using namespace std;
namespace std {
        template <typename T, int D>
        struct _vector : public vector <_vector <T, D - 1>> {
                static_assert(D >= 1, "Dimension must be positive!");
                template <typename... Args>
                _vector(int n = 0, Args... args) : vector <_vector <T, D - 1>> (n, _vector <T, D - 1> (args...)) {}
        };
        // _vector <int, 3> a(n, m, k);: int a[n][m][k].
        // _vector <int, 3> a(n, m, k, x);: int a[n][m][k] initialized with x.
        template <typename T>
        struct _vector <T, 1> : public vector <T> {
                _vector(int n = 0, const T& val = T()) : vector <T> (n, val) {}
        };
}

const int MAX = 1e2 + 2;
const ll MOD[] = {1000000007, 998244353};

int dpL[102][102][2507];
int dpR[102][102][2507];
int n, K, a[102], l, r;
int sum = 0;

void Solve() {
        cin >> n >> l >> r >> K;
        K = min(K, n * n / 4);
        for (int i = 1; i <= n; i++) cin >> a[i];
        sum = accumulate(a + l, a + r + 1, 0);
        for (int i = 1; i < l; i++) {
                for (int j = l; j <= r; j++) {
                        for (int k = 0; k <= K; k++) {
                                dpL[i][j][k] = max(dpL[i - 1][j][k], dpL[i][j - 1][k]);
                                if (k >= j - i) dpL[i][j][k] = max(dpL[i][j][k], dpL[i - 1][j - 1][k - j + i] + a[j] - a[i]);
                        }
                }
        }
        for (int i = n; i > r; i--) {
                for (int j = r; j >= l; j--) {
                        for (int k = 0; k <= K; k++) {
                                dpR[j][i][k] = max(dpR[j + 1][i][k], dpR[j][i + 1][k]);
                                if (k >= i - j) dpR[j][i][k] = max(dpR[j][i][k], dpR[j + 1][i + 1][k - i + j] + a[j] - a[i]);
                        }
                }
        }
        int res = max(dpL[l - 1][r][K], dpR[l][r + 1][K]);
        for (int i = l; i <= r; i++) {
                for (int k = 0; k <= K; k++) {
                        res = max(res, dpL[l - 1][i][k] + dpR[i + 1][r + 1][K - k]);
                }
        }
        cout << sum - res;
}

int32_t main() {
        ios_base::sync_with_stdio(0);
        cin.tie(0);

        #define TASK "HOLDING"
        if (fopen(TASK".INP", "r")) {
                freopen(TASK".INP", "r", stdin);
                freopen(TASK".OUT", "w", stdout);
        }
        
        /* int TEST = 1; cin >> TEST; while (TEST--) */ Solve();

        cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << "s\n";
        return 0;
}

Compilation message (stderr)

holding.cpp: In function 'int32_t main()':
holding.cpp:65:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |                 freopen(TASK".INP", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
holding.cpp:66:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |                 freopen(TASK".OUT", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 33 / 33
• Subtask 3: 33 / 33
• Subtask 4: 22 / 22