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Submission #634651

# Submission time Handle Problem Language Result Execution time Memory
634651 2022-08-24T16:24:59 Z rockoana Rice Hub (IOI11_ricehub) C++17
100 / 100
 13 ms 2516 KB 
#include <vector>

#include "ricehub.h"

using namespace std;

vector<long long> s;
long long cost(int st, int dr, int X[]) {
  int mid = (st + dr) / 2;
  // X[mid + 1] - X[mid] + X[mid + 2] - X[mid]...X[dr] - X[mid];
  // X[mid] - X[mid] + X[mid] - X[mid - 1] + ... + X[mid] - X[st]

  long long res = s[dr] - s[mid] - s[mid];
  if (st != 0) {
    res += s[st - 1];
  }

  if ((dr - st + 1) % 2 == 1) {
    res += X[mid];
  }

  return res;
}

int besthub(int R, int L, int X[], long long B) {
  s.assign(R, 0);
  for (int i = 0; i < R; i++) {
    s[i] += X[i];
    if (i != 0) {
      s[i] += s[i - 1];
    }
  }

  int st = 0;
  int res = 0;
  for (int i = 0; i < R; i++) {
    while (cost(st, i, X) > B) {
      st++;
    }

    res = max(res, i - st + 1);
  }

  return res;
}

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 304 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 296 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 300 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 292 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 304 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 292 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 296 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 296 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 304 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 1 ms 220 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct

Subtask #3
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 292 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 300 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 296 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 232 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 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 0 ms 296 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 312 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 336 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 676 KB Output is correct
2 Correct 3 ms 624 KB Output is correct
3 Correct 13 ms 2484 KB Output is correct
4 Correct 13 ms 2508 KB Output is correct
5 Correct 6 ms 1180 KB Output is correct
6 Correct 6 ms 1204 KB Output is correct
7 Correct 11 ms 2132 KB Output is correct
8 Correct 12 ms 2240 KB Output is correct
9 Correct 5 ms 1064 KB Output is correct
10 Correct 6 ms 1108 KB Output is correct
11 Correct 13 ms 2516 KB Output is correct
12 Correct 13 ms 2476 KB Output is correct
13 Correct 6 ms 1236 KB Output is correct
14 Correct 6 ms 1252 KB Output is correct
15 Correct 10 ms 1948 KB Output is correct
16 Correct 10 ms 1868 KB Output is correct
17 Correct 12 ms 2156 KB Output is correct
18 Correct 11 ms 2208 KB Output is correct
19 Correct 12 ms 2336 KB Output is correct
20 Correct 13 ms 2388 KB Output is correct