oj.uz

Submission #814604

# Submission time Handle Problem Language Result Execution time Memory
814604 2023-08-08T08:30:38 Z erray Ancient Books (IOI17_books) C++17
100 / 100
 182 ms 26724 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 {
    auto Expand = [&](int& l, int& r) {
      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);
        }
      }
    };
    int l = s, r = s;    
    Expand(l, r);
    int add = 0;
    while (upd[r] != 0) {
      --l, ++r;
      ++add;
      Expand(l, r);
    }
    res += 2 * add;
  } 
  return res;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 300 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 300 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 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 0 ms 300 KB Output is correct
11 Correct 1 ms 296 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 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 300 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 300 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 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 0 ms 300 KB Output is correct
11 Correct 1 ms 296 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 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 300 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 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 300 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 300 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 300 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 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 0 ms 300 KB Output is correct
11 Correct 1 ms 296 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 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 300 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 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 300 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 155 ms 20204 KB Output is correct
31 Correct 182 ms 20248 KB Output is correct
32 Correct 80 ms 8428 KB Output is correct
33 Correct 106 ms 20172 KB Output is correct
34 Correct 98 ms 20200 KB Output is correct
35 Correct 96 ms 20156 KB Output is correct
36 Correct 96 ms 20196 KB Output is correct
37 Correct 101 ms 20200 KB Output is correct
38 Correct 100 ms 20348 KB Output is correct
39 Correct 99 ms 20204 KB Output is correct
40 Correct 101 ms 20132 KB Output is correct
41 Correct 126 ms 20248 KB Output is correct
42 Correct 133 ms 20336 KB Output is correct
43 Correct 96 ms 20248 KB Output is correct

Subtask #4
20.0 / 20.0

# 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 1 ms 212 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 304 KB Output is correct
11 Correct 1 ms 212 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 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 304 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 300 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 300 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 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 0 ms 300 KB Output is correct
11 Correct 1 ms 296 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 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 300 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 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 300 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 155 ms 20204 KB Output is correct
31 Correct 182 ms 20248 KB Output is correct
32 Correct 80 ms 8428 KB Output is correct
33 Correct 106 ms 20172 KB Output is correct
34 Correct 98 ms 20200 KB Output is correct
35 Correct 96 ms 20156 KB Output is correct
36 Correct 96 ms 20196 KB Output is correct
37 Correct 101 ms 20200 KB Output is correct
38 Correct 100 ms 20348 KB Output is correct
39 Correct 99 ms 20204 KB Output is correct
40 Correct 101 ms 20132 KB Output is correct
41 Correct 126 ms 20248 KB Output is correct
42 Correct 133 ms 20336 KB Output is correct
43 Correct 96 ms 20248 KB Output is correct
44 Correct 1 ms 212 KB Output is correct
45 Correct 0 ms 212 KB Output is correct
46 Correct 1 ms 212 KB Output is correct
47 Correct 1 ms 296 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 304 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 1 ms 212 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 1 ms 212 KB Output is correct
58 Correct 1 ms 212 KB Output is correct
59 Correct 1 ms 212 KB Output is correct
60 Correct 1 ms 212 KB Output is correct
61 Correct 1 ms 212 KB Output is correct
62 Correct 1 ms 212 KB Output is correct
63 Correct 1 ms 304 KB Output is correct
64 Correct 91 ms 26592 KB Output is correct
65 Correct 89 ms 26600 KB Output is correct
66 Correct 92 ms 26600 KB Output is correct
67 Correct 93 ms 26596 KB Output is correct
68 Correct 10 ms 2772 KB Output is correct
69 Correct 9 ms 2816 KB Output is correct
70 Correct 9 ms 2748 KB Output is correct
71 Correct 9 ms 2816 KB Output is correct
72 Correct 9 ms 2812 KB Output is correct
73 Correct 10 ms 2772 KB Output is correct
74 Correct 91 ms 26596 KB Output is correct
75 Correct 94 ms 26596 KB Output is correct
76 Correct 93 ms 26600 KB Output is correct
77 Correct 96 ms 26596 KB Output is correct
78 Correct 104 ms 26600 KB Output is correct
79 Correct 93 ms 26596 KB Output is correct
80 Correct 74 ms 14820 KB Output is correct
81 Correct 95 ms 26604 KB Output is correct
82 Correct 83 ms 26608 KB Output is correct
83 Correct 96 ms 26600 KB Output is correct
84 Correct 93 ms 26600 KB Output is correct
85 Correct 101 ms 26596 KB Output is correct
86 Correct 93 ms 26588 KB Output is correct
87 Correct 97 ms 26612 KB Output is correct
88 Correct 93 ms 26588 KB Output is correct
89 Correct 95 ms 26596 KB Output is correct
90 Correct 92 ms 26600 KB Output is correct
91 Correct 97 ms 26612 KB Output is correct
92 Correct 102 ms 26724 KB Output is correct