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Submission #949255

# Submission time Handle Problem Language Result Execution time Memory
949255 2024-03-19T04:11:44 Z Muhammad_Aneeq Hacker (BOI15_hac) C++17
100 / 100
 211 ms 11356 KB 
/*
بسم الله الرحمن الرحيم
Author:
                          (:Muhammad Aneeq:)
*/

#include <iostream>
using namespace std;
int const N=5e5+10;
int St[4*N]={};
int pre[N]={};
int n;
void update(int i,int r,int st,int en,int val)
{
    if (st==en)
    {
        St[i]=val;
        return;
    }
    int mid=(st+en)/2;
    if (r<=mid)
        update(i*2,r,st,mid,val);
    else
        update(i*2+1,r,mid+1,en,val);
    St[i]=max(St[i*2],St[i*2+1]);
}
int get(int i,int st,int en,int l,int r)
{
    if (st>r||en<l)
        return 0;
    if (st>=l&&en<=r)
        return St[i];
    int mid=(st+en)/2;
    return (max(get(i*2,st,mid,l,r),get(i*2+1,mid+1,en,l,r)));
}
inline void solve()
{
    cin>>n;
    int a[n];
    for (auto& i:a)
        cin>>i;
    for (int i=0;i<n;i++)
        pre[i+1]=pre[i]+a[i];
    int ans=0;
    for (int i=0;i<n;i++)
    {
        if (i+n/2>n)
        {
            int z=pre[n]-pre[i];
            int f=i+n/2-n;
            z+=pre[f];
            update(1,i,0,n-1,z);
        }
        else
        {
            int z=pre[i+n/2]-pre[i];
            update(1,i,0,n-1,z);
        }
    }
    for (int i=0;i<n;i++)
    {
        int f=i-n/2;
        f=(f+n)%n;
        int g=i+1;
        if (g<f)
            ans=max(ans,pre[n]-get(1,0,n-1,g,f));
        else
        {
            int z=max(get(1,0,n-1,g,n-1),get(1,0,n-1,0,f));
            ans=max(ans,pre[n]-z);
        }
    }
    cout<<ans<<endl;
}
int main()
{
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
        solve();
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2512 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2516 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2488 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2512 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2512 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2516 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2488 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2512 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 2 ms 2392 KB Output is correct
23 Correct 2 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 2 ms 2392 KB Output is correct
26 Correct 2 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 0 ms 2396 KB Output is correct
30 Correct 2 ms 2396 KB Output is correct
31 Correct 2 ms 2396 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 2 ms 2396 KB Output is correct
4 Correct 30 ms 5404 KB Output is correct
5 Correct 74 ms 6236 KB Output is correct
6 Correct 95 ms 6744 KB Output is correct
7 Correct 114 ms 9324 KB Output is correct
8 Correct 197 ms 10920 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2512 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2516 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2488 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2512 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 2 ms 2392 KB Output is correct
23 Correct 2 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 2 ms 2392 KB Output is correct
26 Correct 2 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 0 ms 2396 KB Output is correct
30 Correct 2 ms 2396 KB Output is correct
31 Correct 2 ms 2396 KB Output is correct
32 Correct 1 ms 2396 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 2 ms 2396 KB Output is correct
35 Correct 30 ms 5404 KB Output is correct
36 Correct 74 ms 6236 KB Output is correct
37 Correct 95 ms 6744 KB Output is correct
38 Correct 114 ms 9324 KB Output is correct
39 Correct 197 ms 10920 KB Output is correct
40 Correct 4 ms 2392 KB Output is correct
41 Correct 8 ms 2652 KB Output is correct
42 Correct 11 ms 2652 KB Output is correct
43 Correct 86 ms 6236 KB Output is correct
44 Correct 211 ms 10916 KB Output is correct
45 Correct 39 ms 5468 KB Output is correct
46 Correct 124 ms 9164 KB Output is correct
47 Correct 195 ms 10912 KB Output is correct
48 Correct 196 ms 11356 KB Output is correct
49 Correct 191 ms 10068 KB Output is correct
50 Correct 194 ms 10316 KB Output is correct