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답안 #950586

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
950586 2024-03-20T12:58:04 Z VMaksimoski008 Feast (NOI19_feast) C++14
43 / 100
 100 ms 14516 KB 
#include <bits/stdc++.h>

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

ll dp[500][500];
int n, K;
vector<int> v;

ll f(int pos, int sub) {
    if(pos == n + 1) return (sub == K ? 0 : -1e18);
    if(dp[pos][sub] != -1) return dp[pos][sub];

    ll ans = max(f(pos+1, sub), f(pos+1, sub+1));
    ll sum = 0;

    for(int i=pos; i<=n; i++) {
        sum += v[i];
        ans = max(ans, sum + f(i+1, sub+1));
    }

    return dp[pos][sub] = ans;
}

int32_t main() {
    int neg = 0;
    cin >> n >> K;

    v.resize(n+1);
    vector<ll> pref(n+1);
    for(int i=1; i<=n; i++) {
        cin >> v[i];
        neg += (v[i] < 0);
        pref[i] = pref[i-1] + v[i];
    }

    if(neg == 0) {
        cout << pref[n] << '\n';
        return 0;
    }

    if(K == 1) {
        ll ans = 0, sum = 0, mn = 0;

        for(int i=1; i<=n; i++) {
            sum += v[i];
            ans = max(ans, sum - mn);
            mn = min(mn, sum);
        }

        cout << ans << '\n';
        return 0;
    }

    memset(dp, -1, sizeof(dp));

    cout << f(1, 0) << '\n';
    return 0;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 100 ms 6520 KB Output is correct
2 Correct 81 ms 6740 KB Output is correct
3 Correct 82 ms 6744 KB Output is correct
4 Correct 82 ms 7132 KB Output is correct
5 Correct 82 ms 6748 KB Output is correct
6 Correct 80 ms 6480 KB Output is correct
7 Correct 80 ms 6484 KB Output is correct
8 Correct 100 ms 6864 KB Output is correct
9 Correct 80 ms 6480 KB Output is correct
10 Correct 81 ms 6736 KB Output is correct

Subtask #2
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 43 ms 5724 KB Output is correct
2 Correct 44 ms 5724 KB Output is correct
3 Correct 46 ms 5780 KB Output is correct
4 Runtime error 48 ms 14516 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 88 ms 6740 KB Output is correct
2 Correct 91 ms 6996 KB Output is correct
3 Correct 88 ms 6736 KB Output is correct
4 Correct 88 ms 6784 KB Output is correct
5 Correct 88 ms 6736 KB Output is correct
6 Correct 89 ms 6880 KB Output is correct
7 Correct 89 ms 6892 KB Output is correct
8 Correct 87 ms 6852 KB Output is correct
9 Correct 89 ms 6740 KB Output is correct
10 Correct 89 ms 6736 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2236 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 2 ms 2396 KB Output is correct
8 Correct 1 ms 2240 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 2140 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2236 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 2 ms 2396 KB Output is correct
8 Correct 1 ms 2240 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 2140 KB Output is correct
11 Correct 6 ms 2396 KB Output is correct
12 Correct 5 ms 2396 KB Output is correct
13 Correct 5 ms 2396 KB Output is correct
14 Correct 5 ms 2236 KB Output is correct
15 Correct 6 ms 2396 KB Output is correct
16 Correct 4 ms 2392 KB Output is correct
17 Correct 5 ms 2416 KB Output is correct
18 Correct 5 ms 2396 KB Output is correct
19 Correct 5 ms 2396 KB Output is correct
20 Correct 6 ms 2396 KB Output is correct

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2236 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 2 ms 2396 KB Output is correct
8 Correct 1 ms 2240 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 2140 KB Output is correct
11 Correct 6 ms 2396 KB Output is correct
12 Correct 5 ms 2396 KB Output is correct
13 Correct 5 ms 2396 KB Output is correct
14 Correct 5 ms 2236 KB Output is correct
15 Correct 6 ms 2396 KB Output is correct
16 Correct 4 ms 2392 KB Output is correct
17 Correct 5 ms 2416 KB Output is correct
18 Correct 5 ms 2396 KB Output is correct
19 Correct 5 ms 2396 KB Output is correct
20 Correct 6 ms 2396 KB Output is correct
21 Runtime error 3 ms 4440 KB Execution killed with signal 11
22 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 100 ms 6520 KB Output is correct
2 Correct 81 ms 6740 KB Output is correct
3 Correct 82 ms 6744 KB Output is correct
4 Correct 82 ms 7132 KB Output is correct
5 Correct 82 ms 6748 KB Output is correct
6 Correct 80 ms 6480 KB Output is correct
7 Correct 80 ms 6484 KB Output is correct
8 Correct 100 ms 6864 KB Output is correct
9 Correct 80 ms 6480 KB Output is correct
10 Correct 81 ms 6736 KB Output is correct
11 Correct 43 ms 5724 KB Output is correct
12 Correct 44 ms 5724 KB Output is correct
13 Correct 46 ms 5780 KB Output is correct
14 Runtime error 48 ms 14516 KB Execution killed with signal 11
15 Halted 0 ms 0 KB -