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Submission #705385

# Submission time Handle Problem Language Result Execution time Memory
705385 2023-03-04T08:22:32 Z LittleCube Hacker (BOI15_hac) C++17
100 / 100
 58 ms 13608 KB 
#pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define F first
#define S second
using namespace std;

ll n, h, v[500005], s[500005], sum, ans;

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    cin >> n;
    h = n / 2;
    for (int i = 0; i < n; i++)
        cin >> v[i];
    for (int i = 0; i < n; i++)
        sum += v[i];
    for (int i = 0; i < h; i++)
        s[0] += v[i];
    for (int i = 1; i < n; i++)
        s[i] = s[i - 1] - v[i - 1] + v[(i + h - 1) % n];
    deque<pll> dq;
    for (int i = 1; i < n - h + 1; i++)
    {
        while (!dq.empty() && dq.back().F < s[i])
            dq.pop_back();
        dq.push_back(pll(s[i], i));
    }
    for (int i = 0; i < n; i++)
    {
        ans = max(ans, sum - dq.front().F);
        if (dq.front().S == i + 1)
            dq.pop_front();
        int j = (i - h + 1 + n) % n;
        while (!dq.empty() && dq.back().F < s[j])
            dq.pop_back();
        dq.push_back(pll(s[j], j));
    }
    cout << ans << '\n';
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 324 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 212 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 324 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 328 KB Output is correct
21 Correct 1 ms 324 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 380 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 468 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 10 ms 1872 KB Output is correct
5 Correct 20 ms 4180 KB Output is correct
6 Correct 28 ms 4904 KB Output is correct
7 Correct 31 ms 5768 KB Output is correct
8 Correct 51 ms 8840 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 324 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 328 KB Output is correct
21 Correct 1 ms 324 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 380 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 468 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 10 ms 1872 KB Output is correct
36 Correct 20 ms 4180 KB Output is correct
37 Correct 28 ms 4904 KB Output is correct
38 Correct 31 ms 5768 KB Output is correct
39 Correct 51 ms 8840 KB Output is correct
40 Correct 2 ms 468 KB Output is correct
41 Correct 2 ms 724 KB Output is correct
42 Correct 4 ms 852 KB Output is correct
43 Correct 21 ms 4468 KB Output is correct
44 Correct 58 ms 9500 KB Output is correct
45 Correct 10 ms 2264 KB Output is correct
46 Correct 31 ms 6260 KB Output is correct
47 Correct 53 ms 9492 KB Output is correct
48 Correct 49 ms 13608 KB Output is correct
49 Correct 45 ms 13488 KB Output is correct
50 Correct 46 ms 13516 KB Output is correct