Submission #1268781

#	Time	Username	Problem	Language	Result	Execution time	Memory
1268781		MinhKien	Cloud Computing (CEOI18_clo)	C++20	0 / 100	2 ms	3400 KiB

clo

#include <algorithm>
#include <iostream>
#include <cstring>

using namespace std;

#define ll long long
const int N = 4010;
const ll INF = 1e17;

struct object {
    int room, f;
    ll cost;

    bool operator < (const object &o) const {
        if (f == o.f) return cost > o.cost;
        return f > o.f;
    }
} a[N];

int n, m;
ll dp[2][50 * N];

int main() {
    #define tst "DATPHONG"
    freopen(tst".INP", "r", stdin);
    freopen(tst".OUT", "w", stdout);

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

    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i].room >> a[i].f >> a[i].cost;
        a[i].cost *= -1;
    }

    cin >> m;
    for (int i = 1; i <= m; ++i) {
        cin >> a[n + i].room >> a[n + i].f >> a[n + i].cost;
    }

    n += m;
    sort(a + 1, a + n + 1);

    fill_n(dp[0], 50 * N, -INF);
    fill_n(dp[1], 50 * N, -INF);
    dp[0][0] = 0;
    for (int i = 1; i <= n; ++i) {
        int b = i & 1;
        fill_n(dp[b], 50 * i, -INF);
        
        if (a[i].cost < 0) {
            for (int j = 0; j <= 50 * i; ++j) {
                if (j + a[i].room <= 50 * i) dp[b][j + a[i].room] = max(dp[b ^ 1][j] + a[i].cost, dp[b][j + a[i].room]);
                dp[b][j] = max(dp[b][j], dp[b ^ 1][j]);
            }
        } else {
            for (int j = 0; j <= 50 * i; ++j) {
                dp[b][j] = max(dp[b ^ 1][j], dp[b][j]);
                if (j >= a[i].room) {
                    dp[b][j - a[i].room] = max(dp[b][j - a[i].room], dp[b ^ 1][j] + a[i].cost);
                }
            }
        }
    }

    ll ans = 0;
    for (int i = 0; i <= 50 * n; ++i) {
        ans = max(ans, dp[n & 1][i]);
    }
    cout << ans << "\n";

    return 0;
}

Compilation message (stderr)

clo.cpp: In function 'int main()':
clo.cpp:26:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |     freopen(tst".INP", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
clo.cpp:27:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     freopen(tst".OUT", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 18
• Subtask 2: 0 / 18
• Subtask 3: 0 / 18
• Subtask 4: 0 / 18
• Subtask 5: 0 / 18
• Subtask 6: 0 / 10