Submission #1075632

#	Time	Username	Problem	Language	Result	Execution time	Memory
1075632		tradz	Holding (COCI20_holding)	C++14	55 / 110	108 ms	204584 KiB

holding

#include <bits/stdc++.h>

#define For(i,a,b) for(int i = a; i <= b; i++)
#define Ford(i,a,b) for(int i = a; i >= b; i--)
#define ll long long
#define ii pair<int,int>
#define fi first
#define se second
#define all(v) v.begin(),v.end()
#define RRH(v) v.resize(unique(all(v)) - v.begin())

using namespace std;
const int  N = 1e6+7;
const int M = 1e9+7;
const ll oo = 3e18;

int n, l, r, k;
int a[N];

int dpL[102][102][2507];
int dpR[102][102][2507];

int main() {
    ios::sync_with_stdio(0); cin.tie(0);

    #define TASK ""
    if (fopen (".inp", "r")) {
        freopen (".inp", "r", stdin);
        freopen (".out", "w", stdout);
    }
    if(fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }

    cin >> n >> l >> r >> k;
    memset(dpL, 0, sizeof dpL);
    memset(dpR, 0, sizeof dpR);
    For (i, 1, n) cin >> a[i];
    k = min(k, n * n / 4);
    int sum = 0;
    for (int i = l; i <= r; i++) sum += a[i];
    for (int i = 1; i < l; i++) {
        for (int j = l; j <= r; j++) {
            for (int h = 0; h <= k; h++) {
                dpL[i][j][h] = max(dpL[i - 1][j][h], dpL[i][j - 1][h]);
                if (h >= (j - i)) dpL[i][j][h] = max(dpL[i][j][h], dpL[i - 1][j - 1][h - j + i] + a[j] - a[i]);
            }
        }
    }

    for (int i = n; i > r; i--) {
        for (int j = r; j >= l; j--) {
            for (int h = 0; h <= k; h++) {
                dpR[j][i][h] = max(dpR[j + 1][i][h], dpR[j][i + 1][h]);
                if (h >= (i - j)) dpR[j][i][h] = max(dpR[j][i][h], dpR[j + 1][i + 1][k - i + j] + a[j] - a[i]);
            }
        }
    }

    int ans = 0;
    ans = max(dpL[l - 1][r][k], dpR[l][r + 1][k]);
    for (int i = l; i <= r; i++) {
        for (int h = 0; h <= k; h++) {
            ans = max(ans, dpL[l - 1][i][h] + dpR[i + 1][r + 1][k - h]);
        }
    }

    cout << sum - ans << '\n';

    return 0;
}

Compilation message (stderr)

holding.cpp: In function 'int main()':
holding.cpp:28:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         freopen (".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~
holding.cpp:29:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         freopen (".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
holding.cpp:32:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         freopen(TASK".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
holding.cpp:33:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |         freopen(TASK".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 33 / 33
• Subtask 3: 0 / 33
• Subtask 4: 0 / 22