# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1259100 | tminh | Feast (NOI19_feast) | C++20 | 73 ms | 34624 KiB |
#include "bits/stdc++.h"
using namespace std;
#define task ""
#define ll long long
#define endl '\n'
#define fi first
#define se second
#define vall(a) (a).begin(), (a).end()
#define sze(a) (int)a.size()
#define pii pair<int, int>
#define pll pair<ll, ll>
#define ep emplace_back
#define pb push_back
#define pf push_front
const ll mod = 1e9 + 7;
const int N = 1e6 + 5;
const ll oo = 1e18;
bool START;
int n, k;
bool vis[2005][2005][2];
ll a[N], dp[2005][2005][2];
ll f(int pos, int cnt, bool cur) {
if (pos == n + 1) return (cnt + cur <= k ? 0 : -oo);
ll &res = dp[pos][cnt][cur];
if (vis[pos][cnt][cur]) return res;
vis[pos][cnt][cur] = true;
res = f(pos + 1, cnt, 1) + a[pos];
if (cnt + cur <= k) res = max(f(pos + 1, cnt + cur, 0), res);
return res;
}
inline void solve() {
cout << f(1, 0, 0);
}
inline void input() {
cin >> n >> k;
for (int i = 1; i <= n; ++i) cin >> a[i];
return solve();
}
bool END;
int main() {
if(fopen(task ".inp", "r")) {
freopen(task ".inp", "r", stdin);
freopen(task ".out", "w", stdout);
}
ios_base::sync_with_stdio(false);
cin.tie(nullptr); cout.tie(nullptr);
input();
cerr << endl << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << 's' << endl;
cerr << "Memory: " << fabs ((&END - &START)) / 1048576.0 << "MB\n";
return 0;
}
Compilation message (stderr)
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