oj.uz

Submission #814557

# Submission time Handle Problem Language Result Execution time Memory
814557 2023-08-08T08:20:17 Z erray Ancient Books (IOI17_books) C++17
50 / 100
 171 ms 26600 KB 
#include "books.h"
//author: erray
#include <bits/stdc++.h>

using namespace std;
 
#ifdef DEBUG
  #include "/home/ioi/codes/debug.h"
#else
  #define debug(...) (void) 37
#endif


long long minimum_walk(std::vector<int> P, int s) {
  int N = int(P.size());
	//assert(s == 0);
  long long res = 0;
  int start = 0, end = N - 1;
  while (start < N && P[start] == start) {
    ++start;
  }
  while (end >= 0 && P[end] == end) {
    --end;
  }
  if (start == N) {
    return 0;
  }
  //res += 2 * start;
  vector<int> upd(N);
  for (int i = 0; i < N; ++i) {
    int L = P[i], R = i;
    if (L > R) {
      swap(L, R);
    }
    upd[L] += 1;
    upd[R] -= 1;  
    res += (R - L);
  }
  for (int i = 0; i < N - 1; ++i) {
    upd[i + 1] += upd[i];
  }
  for (int i = start; i < end; ++i) {
    if (upd[i] == 0) {
      res += 2;
    }
  }
  debug(upd, res);
  vector<int> L(N, -1), R(N);
  for (int i = 0; i < N; ++i) {
    if (L[i] == -1) {
      int v = i;
      L[i] = R[i] = i;
      do {
        v = P[v];
        L[i] = min(L[i], v);
        R[i] = max(R[i], v);
      } while (v != i);
      do {
        v = P[v];
        L[v] = L[i];
        R[v] = R[i];
      } while (v != i);
    }
  }
  debug(start, end, res, L, R);
  
  if (s <= start) {
    res += (start - s) * 2;
  } else if (end <= s) {
    res += (s - end) * 2;
  } else {
    int l = s, r = s;
    int add = 0;
    while (upd[r] != 0) {
      debug(l, r);
      --l, ++r;
      ++add;
      int go_l = min(L[l], L[r]);
      int go_r = max(R[l], R[r]);
      while (go_l < l || go_r > r) {
        while (go_l < l) {
          --l;
          go_l = min(L[l], go_l);
          go_r = max(R[l], go_r);
        }
        while (go_r > r) {
          ++r;
          go_l = min(L[r], go_l);
          go_r = max(R[r], go_r);
        }
      }
    }
    res += 2 * add;
  } 
  return res;
}

Subtask #1
12.0 / 12.0

# 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 1 ms 300 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 296 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 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 304 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 300 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 1 ms 300 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 296 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 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 304 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 300 KB Output is correct
19 Correct 1 ms 252 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 300 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 300 KB Output is correct
29 Correct 0 ms 212 KB Output is correct

Subtask #3
28.0 / 28.0

# 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 1 ms 300 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 296 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 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 304 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 300 KB Output is correct
19 Correct 1 ms 252 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 300 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 300 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 142 ms 26596 KB Output is correct
31 Correct 171 ms 26596 KB Output is correct
32 Correct 76 ms 14808 KB Output is correct
33 Correct 90 ms 26588 KB Output is correct
34 Correct 91 ms 26472 KB Output is correct
35 Correct 94 ms 26472 KB Output is correct
36 Correct 96 ms 26600 KB Output is correct
37 Correct 92 ms 26592 KB Output is correct
38 Correct 92 ms 26596 KB Output is correct
39 Correct 90 ms 26596 KB Output is correct
40 Correct 107 ms 26596 KB Output is correct
41 Correct 119 ms 26588 KB Output is correct
42 Correct 114 ms 26588 KB Output is correct
43 Correct 93 ms 26592 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 300 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3306'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 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 1 ms 300 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 296 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 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 304 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 300 KB Output is correct
19 Correct 1 ms 252 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 300 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 300 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 142 ms 26596 KB Output is correct
31 Correct 171 ms 26596 KB Output is correct
32 Correct 76 ms 14808 KB Output is correct
33 Correct 90 ms 26588 KB Output is correct
34 Correct 91 ms 26472 KB Output is correct
35 Correct 94 ms 26472 KB Output is correct
36 Correct 96 ms 26600 KB Output is correct
37 Correct 92 ms 26592 KB Output is correct
38 Correct 92 ms 26596 KB Output is correct
39 Correct 90 ms 26596 KB Output is correct
40 Correct 107 ms 26596 KB Output is correct
41 Correct 119 ms 26588 KB Output is correct
42 Correct 114 ms 26588 KB Output is correct
43 Correct 93 ms 26592 KB Output is correct
44 Incorrect 1 ms 300 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3306'
45 Halted 0 ms 0 KB -