oj.uz

Submission #857625

# Submission time Handle Problem Language Result Execution time Memory
857625 2023-10-06T14:28:51 Z hungnt Feast (NOI19_feast) C++14
12 / 100
 28 ms 5604 KB 
#include<bits/stdc++.h>
using namespace std;

const int N = 300005;

int n, k;
int a[N];
long long dp[2003][2003][2];

void sub3()
{
    long long ans = 0, mx = 0, mn = 0, s = 0;
    for(int i = 1; i <= n; i++)
    {
        s += a[i];
        mx = max(mx, s);
        mn = min(mn, s);
        ans = max(ans, mx - mn);
    }
    cout << ans;
}

void sub6()
{
    long long ans=0;
    dp[0][0][1] = 0;
    dp[0][0][0] = 0;
    for(int i = 1; i <= n; i++)
    {
        dp[i][0][0] = 0;
        for(int j = 1; j <= k; j++)
        {
            dp[i][j][0] = max(dp[i - 1][j][1], dp[i - 1][j][0]);
            dp[i][j][1] = max(dp[i - 1][j][1], dp[i - 1][j - 1][0]) + a[i];
			ans = max({ans, dp[i][j][0], dp[i][j][1]});
        }
    }
    cout << ans;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n >> k;
    int cntam = 0;
    long long s = 0;
    for(int i = 1; i <= n; i++)
    {
        cin >> a[i];
        cntam += (a[i] < 0);
    }
    if(k == 1)
    {
        sub3();
        return 0;
    }
    if(cntam <= 1)
    {
        long long ans = 0;
        for(int i = 1; i <= n; i++) if(a[i] > 0) ans += a[i];
        cout << ans;
        return 0;
    }
    sub6();
    return 0;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:47:15: warning: unused variable 's' [-Wunused-variable]
   47 |     long long s = 0;
      |               ^

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 2652 KB Output is correct
2 Correct 22 ms 2512 KB Output is correct
3 Correct 22 ms 2648 KB Output is correct
4 Correct 23 ms 2648 KB Output is correct
5 Correct 23 ms 2652 KB Output is correct
6 Correct 21 ms 2644 KB Output is correct
7 Correct 24 ms 2516 KB Output is correct
8 Correct 26 ms 2512 KB Output is correct
9 Correct 21 ms 2648 KB Output is correct
10 Correct 22 ms 2512 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 2648 KB Output is correct
2 Correct 15 ms 3672 KB Output is correct
3 Correct 15 ms 3760 KB Output is correct
4 Correct 15 ms 3672 KB Output is correct
5 Correct 28 ms 5436 KB Output is correct
6 Correct 16 ms 3712 KB Output is correct
7 Correct 14 ms 3672 KB Output is correct
8 Correct 23 ms 5436 KB Output is correct
9 Correct 23 ms 5604 KB Output is correct
10 Correct 15 ms 3780 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 26 ms 2504 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 2652 KB Output is correct
2 Correct 22 ms 2512 KB Output is correct
3 Correct 22 ms 2648 KB Output is correct
4 Correct 23 ms 2648 KB Output is correct
5 Correct 23 ms 2652 KB Output is correct
6 Correct 21 ms 2644 KB Output is correct
7 Correct 24 ms 2516 KB Output is correct
8 Correct 26 ms 2512 KB Output is correct
9 Correct 21 ms 2648 KB Output is correct
10 Correct 22 ms 2512 KB Output is correct
11 Correct 14 ms 2648 KB Output is correct
12 Correct 15 ms 3672 KB Output is correct
13 Correct 15 ms 3760 KB Output is correct
14 Correct 15 ms 3672 KB Output is correct
15 Correct 28 ms 5436 KB Output is correct
16 Correct 16 ms 3712 KB Output is correct
17 Correct 14 ms 3672 KB Output is correct
18 Correct 23 ms 5436 KB Output is correct
19 Correct 23 ms 5604 KB Output is correct
20 Correct 15 ms 3780 KB Output is correct
21 Incorrect 26 ms 2504 KB Output isn't correct
22 Halted 0 ms 0 KB -