Submission #697978

#	Time	Username	Problem	Language	Result	Execution time	Memory
697978		sreesh	Feast (NOI19_feast)	C++17	41 / 100	131 ms	262148 KiB

feast

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

const ll INF = (ll) 1e18;

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

    int n, k;
    cin >> n >> k;

    vector<int> a(n);
    for (int& x : a) cin >> x;
    
    vector<vector<ll>> dp(n, vector<ll>(n + 1, -INF));
    vector<ll> best(n + 1, -INF);
    best[0] = 0;
    
    for (int i = 0; i < n; ++i) {
        vector<ll> new_best = best;
        for (int j = 1; j <= n; ++j) {
            // extend previous one
            if (i > 0) dp[i][j] = dp[i - 1][j] + a[i];
            // start new one here
            dp[i][j] = max(dp[i][j], best[j - 1] + a[i]);
            new_best[j] = max(new_best[j], dp[i][j]);
        }
        best = new_best;
    }

    ll ans = 0;
    for (int i = 0; i < n; ++i) for (int j = 0; j <= k; ++j) ans = max(ans, dp[i][j]);
    cout << ans << endl;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 18
• Subtask 4: 10 / 10
• Subtask 5: 11 / 11
• Subtask 6: 20 / 20
• Subtask 7: 0 / 29