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Submission #30489

# Submission time Handle Problem Language Result Execution time Memory
30489 2017-07-24T00:03:01 Z sampriti Hacker (BOI15_hac) C++14
100 / 100
 766 ms 18784 KB 
#include <cstdio>
#include <algorithm>
#include <set>

using namespace std;

int N;
int A[500000];
int P[500000];
int sum[500000];  // sum[i..(i+len)]
multiset<int> S;

int query(int i, int j) {
  if(i > j) {
    return query(i, N - 1) + query(0, j);
  }

  if(i == 0) return P[j];
  return P[j] - P[i - 1];
}

int main() {
  scanf("%d", &N);

  for(int i = 0; i < N; i++) scanf("%d", &A[i]);
  P[0] = A[0];
  for(int i = 1; i < N; i++) P[i] = P[i - 1] + A[i];

  int len = (N + 1)/2;
  for(int i = 0; i < N; i++) {
    sum[i] = query(i, (i + len - 1) % N);
  }

  int ans = 0;

  int L = 0 - (len - 1) + N, R = 0;
  int j = L;
  while(j != 1) {
    S.insert(sum[j]);
    j = (j + 1) % N;
  }

  for(int i = 0; i < N; i++) {
    ans = max(ans, *S.begin());
    S.erase(S.find(sum[L]));
    L = (L + 1) % N;
    R = (R + 1) % N;
    S.insert(sum[R]);
  }

  printf("%d\n", ans);
}

Compilation message

hac.cpp: In function 'int main()':
hac.cpp:23:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &N);
                  ^
hac.cpp:25:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for(int i = 0; i < N; i++) scanf("%d", &A[i]);
                                                ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 7036 KB Output is correct
2 Correct 0 ms 7036 KB Output is correct
3 Correct 0 ms 7036 KB Output is correct
4 Correct 0 ms 7036 KB Output is correct
5 Correct 0 ms 7036 KB Output is correct
6 Correct 0 ms 7036 KB Output is correct
7 Correct 0 ms 7036 KB Output is correct
8 Correct 0 ms 7036 KB Output is correct
9 Correct 0 ms 7036 KB Output is correct
10 Correct 0 ms 7036 KB Output is correct
11 Correct 0 ms 7036 KB Output is correct
12 Correct 0 ms 7036 KB Output is correct
13 Correct 0 ms 7036 KB Output is correct
14 Correct 0 ms 7036 KB Output is correct
15 Correct 0 ms 7036 KB Output is correct
16 Correct 0 ms 7036 KB Output is correct
17 Correct 0 ms 7036 KB Output is correct
18 Correct 0 ms 7036 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 7036 KB Output is correct
2 Correct 0 ms 7036 KB Output is correct
3 Correct 0 ms 7036 KB Output is correct
4 Correct 0 ms 7036 KB Output is correct
5 Correct 0 ms 7036 KB Output is correct
6 Correct 0 ms 7036 KB Output is correct
7 Correct 0 ms 7036 KB Output is correct
8 Correct 0 ms 7036 KB Output is correct
9 Correct 0 ms 7036 KB Output is correct
10 Correct 0 ms 7036 KB Output is correct
11 Correct 0 ms 7036 KB Output is correct
12 Correct 0 ms 7036 KB Output is correct
13 Correct 0 ms 7036 KB Output is correct
14 Correct 0 ms 7036 KB Output is correct
15 Correct 0 ms 7036 KB Output is correct
16 Correct 0 ms 7036 KB Output is correct
17 Correct 0 ms 7036 KB Output is correct
18 Correct 0 ms 7036 KB Output is correct
19 Correct 0 ms 7036 KB Output is correct
20 Correct 0 ms 7036 KB Output is correct
21 Correct 0 ms 7036 KB Output is correct
22 Correct 0 ms 7168 KB Output is correct
23 Correct 3 ms 7168 KB Output is correct
24 Correct 0 ms 7168 KB Output is correct
25 Correct 3 ms 7168 KB Output is correct
26 Correct 3 ms 7168 KB Output is correct
27 Correct 0 ms 7036 KB Output is correct
28 Correct 0 ms 7036 KB Output is correct
29 Correct 0 ms 7036 KB Output is correct
30 Correct 0 ms 7168 KB Output is correct
31 Correct 3 ms 7168 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 7036 KB Output is correct
2 Correct 0 ms 7036 KB Output is correct
3 Correct 3 ms 7168 KB Output is correct
4 Correct 59 ms 8884 KB Output is correct
5 Correct 203 ms 11788 KB Output is correct
6 Correct 286 ms 12976 KB Output is correct
7 Correct 296 ms 14032 KB Output is correct
8 Correct 766 ms 18784 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 7036 KB Output is correct
2 Correct 0 ms 7036 KB Output is correct
3 Correct 0 ms 7036 KB Output is correct
4 Correct 0 ms 7036 KB Output is correct
5 Correct 0 ms 7036 KB Output is correct
6 Correct 0 ms 7036 KB Output is correct
7 Correct 0 ms 7036 KB Output is correct
8 Correct 0 ms 7036 KB Output is correct
9 Correct 0 ms 7036 KB Output is correct
10 Correct 0 ms 7036 KB Output is correct
11 Correct 0 ms 7036 KB Output is correct
12 Correct 0 ms 7036 KB Output is correct
13 Correct 0 ms 7036 KB Output is correct
14 Correct 0 ms 7036 KB Output is correct
15 Correct 0 ms 7036 KB Output is correct
16 Correct 0 ms 7036 KB Output is correct
17 Correct 0 ms 7036 KB Output is correct
18 Correct 0 ms 7036 KB Output is correct
19 Correct 0 ms 7036 KB Output is correct
20 Correct 0 ms 7036 KB Output is correct
21 Correct 0 ms 7036 KB Output is correct
22 Correct 0 ms 7168 KB Output is correct
23 Correct 3 ms 7168 KB Output is correct
24 Correct 0 ms 7168 KB Output is correct
25 Correct 3 ms 7168 KB Output is correct
26 Correct 3 ms 7168 KB Output is correct
27 Correct 0 ms 7036 KB Output is correct
28 Correct 0 ms 7036 KB Output is correct
29 Correct 0 ms 7036 KB Output is correct
30 Correct 0 ms 7168 KB Output is correct
31 Correct 3 ms 7168 KB Output is correct
32 Correct 0 ms 7036 KB Output is correct
33 Correct 0 ms 7036 KB Output is correct
34 Correct 3 ms 7168 KB Output is correct
35 Correct 59 ms 8884 KB Output is correct
36 Correct 203 ms 11788 KB Output is correct
37 Correct 286 ms 12976 KB Output is correct
38 Correct 296 ms 14032 KB Output is correct
39 Correct 766 ms 18784 KB Output is correct
40 Correct 6 ms 7300 KB Output is correct
41 Correct 6 ms 7564 KB Output is correct
42 Correct 16 ms 7696 KB Output is correct
43 Correct 226 ms 11788 KB Output is correct
44 Correct 496 ms 18784 KB Output is correct
45 Correct 99 ms 9412 KB Output is correct
46 Correct 306 ms 14032 KB Output is correct
47 Correct 673 ms 18784 KB Output is correct
48 Correct 369 ms 18784 KB Output is correct
49 Correct 326 ms 18784 KB Output is correct
50 Correct 333 ms 18784 KB Output is correct