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Submission #807854

# Submission time Handle Problem Language Result Execution time Memory
807854 2023-08-05T03:07:27 Z nonono Hacker (BOI15_hac) C++14
100 / 100
 62 ms 10696 KB 
#include <bits/stdc++.h>
using namespace std;

const int mxN = 1e6 + 5;

int n, m;
int a[mxN];
int b[mxN];

int main() {
    #define taskname ""

    if(fopen(taskname".inp", "r")) {
        freopen(taskname".inp", "r", stdin);
        freopen(taskname".out", "w", stdout);
    }

    cin.tie(0)->sync_with_stdio(0);

    cin >> n;
    
    for(int i = 1; i <= n; i ++) {
        cin >> a[i];
        a[n + i] = a[i];
    }
    
    m = (n + 1) / 2;
    
    for(int i = 1; i <= 2 * n; i ++) {
        b[i] += b[i - 1] + a[i];
        if(i >= m) b[i] -= a[i - m];
    }
    
    deque<int> dq;
    
    int result = 0;
    for(int i = m; i <= 2 * n; i ++) {
        while(!dq.empty() && i - dq.front() >= m) dq.pop_front();
        while(!dq.empty() && b[dq.back()] >= b[i]) dq.pop_back();
        dq.push_back(i);
        if(i >= 2 * m - 1) result = max(result, b[dq.front()]);
    }
    
    cout << result << "\n";
    return 0;
}

Compilation message

hac.cpp: In function 'int main()':
hac.cpp:14:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
hac.cpp:15:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

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

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 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 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 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 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 0 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 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 11 ms 1896 KB Output is correct
5 Correct 16 ms 4224 KB Output is correct
6 Correct 22 ms 5232 KB Output is correct
7 Correct 25 ms 6308 KB Output is correct
8 Correct 62 ms 10316 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 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 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 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 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 0 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 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 328 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 11 ms 1896 KB Output is correct
36 Correct 16 ms 4224 KB Output is correct
37 Correct 22 ms 5232 KB Output is correct
38 Correct 25 ms 6308 KB Output is correct
39 Correct 62 ms 10316 KB Output is correct
40 Correct 2 ms 472 KB Output is correct
41 Correct 2 ms 724 KB Output is correct
42 Correct 3 ms 852 KB Output is correct
43 Correct 17 ms 4236 KB Output is correct
44 Correct 43 ms 10296 KB Output is correct
45 Correct 8 ms 2260 KB Output is correct
46 Correct 27 ms 6276 KB Output is correct
47 Correct 43 ms 10240 KB Output is correct
48 Correct 36 ms 10468 KB Output is correct
49 Correct 33 ms 10684 KB Output is correct
50 Correct 35 ms 10696 KB Output is correct