Submission #362676

#	Time	Username	Problem	Language	Result	Execution time	Memory
362676		Lam_lai_cuoc_doi	Cake 3 (JOI19_cake3)	C++17	0 / 100	40 ms	67820 KiB

cake3

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;

const bool typetest = 0;
const int N = 2e2 + 5;
const ll Inf = 1e17;
int n, m;
struct Pakage
{
    ll c, v;
    bool operator<(const Pakage &a) const
    {
        return c < a.c;
    }
} a[N];
ll dp[N][N][N];

void Read()
{
    cin >> n >> m;
    for (int i = 1; i <= n; ++i)
        cin >> a[i].v >> a[i].c;
}

template <class T>
void Max(T &x, T y)
{
    if (x < y)
        x = y;
}

void Solve()
{
    fill_n(&dp[0][0][0], N * N * N, -Inf);
    dp[1][0][0] = 0;
    for (int i = 1; i <= n; ++i)
        for (int j = 0; j < i && j <= m; ++j)
            for (int t = 0; t <= 2 * j && t <= m; t += 2)
            {
                //cout << i << " " << j << " " << t << ": " << dp[i][j][t] << "\n";
                Max(dp[i + 1][j][t], dp[i][j][t]);
                if (j == m - 1 || t > 2)
                    Max(dp[i + 1][j + 1][t - 2], dp[i][j][t] + a[i].v - 2 * a[i].c);
                if (t > 0)
                    Max(dp[i + 1][j + 1][t], dp[i][j][t] + a[i].v);
                Max(dp[i + 1][j + 1][t + 2], dp[i][j][t] + a[i].v + 2 * a[i].c);
            }
    cout << dp[n + 1][m][0];
}

int32_t main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t(1);
    if (typetest)
        cin >> t;
    for (int _ = 1; _ <= t; ++_)
    {
        Read();
        Solve();
    }
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 19
• Subtask 3: 0 / 76