oj.uz

Submission #782322

# Submission time Handle Problem Language Result Execution time Memory
782322 2023-07-13T19:46:46 Z ikaurov Ancient Books (IOI17_books) C++14
50 / 100
 588 ms 108136 KB 
// #include "books.h"
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define all(arr) (arr).begin(), (arr).end()
#define ll long long
#define ld long double
#define pb push_back
#define sz(x) (int)(x).size()
#define fi first
#define se second
#define endl '\n'

const int N = 1e6 + 20, INF = 1e9;

int t[4 * N];

void modify(int v, int tl, int tr, int pos, int val){
  if (tl == tr){
    t[v] = val;
    return;
  }
  int tm = (tl + tr) / 2;
  if (pos <= tm) modify(2 * v + 1, tl, tm, pos, val);
  else modify(2 * v + 2, tm + 1, tr, pos, val);
  t[v] = min(t[2 * v + 1], t[2 * v + 2]);
}

int query(int v, int tl, int tr, int l, int r){
  if (l > r) return INF;
  if (tl == l && tr == r) return t[v];
  int tm = (tl + tr) / 2;
  return min(
    query(2 * v + 1, tl, tm, l, min(r, tm)),
    query(2 * v + 2, tm + 1, tr, max(l, tm + 1), r)
  );
}

long long minimum_walk(std::vector<int> p, int s) {
	int n = sz(p);
  ll ans = 0;
  for (int i = 0; i < n; i++){
    ans += abs(i - p[i]);
  }
  int mincycle = -1, maxcycle = -1;
  for (int i = 0; i < n; i++) if (i != p[i]){
    mincycle = i;
    break;
  }
  for (int i = n - 1; i >= 0; i--) if (i != p[i]){
    maxcycle = i;
    break;
  }
  if (mincycle == -1) return 0;
  for (int i = mincycle, mx = -1; i < n;){
    mx = max(mx, p[i]);
    if (mx <= i){
      int j = i + 1;
      while (j < n && j == p[j]) j++;
      if (j == n) break;
      ans += 2 * (j - i), i = j;
    }
    else i++;
  }
  if (s < mincycle) return ans + 2 * (mincycle - s);
  if (s > maxcycle) return ans + 2 * (s - maxcycle);
  vector<bool> cycleend(n);
  for (int i = 0, mx = -1; i < n; i++){
    mx = max(mx, p[i]);
    if (mx <= i) cycleend[i] = 1;
  }

  vector<int> cur, used(n), cid(n), minpos(n, INF), maxpos(n, -1);
  vector<int> minl(n, INF), maxr(n, -1);
  vector<vector<int>> has(n);

  int id = 0;

  function<void(int)> dfs = [&] (int v){
    used[v] = 1, cid[v] = id;
    minpos[id] = min(minpos[id], v);
    maxpos[id] = max(maxpos[id], v);
    has[id].pb(v);
    if (!used[p[v]]) dfs(p[v]);
  };

  for (int i = 0; i < n; i++){
    if (used[i]) continue;
    dfs(i);
    id++;
  }

  vector<int> order(id);
  iota(all(order), 0);

  sort(all(order), [&] (int i, int j){
    return minpos[i] < minpos[j];
  });

  for (int i = 0; i < 4 * n; i++) t[i] = INF;

  for (auto i : order){
    minl[i] = min(minpos[i], query(0, 0, n - 1, minpos[i], maxpos[i]));
    for (auto v : has[i]) modify(0, 0, n - 1, v, minl[i]);
  }

  sort(all(order), [&] (int i, int j){
    return maxpos[i] > maxpos[j];
  });

  for (int i = 0; i < 4 * n; i++) t[i] = INF;

  for (auto i : order){
    maxr[i] = max(maxpos[i], -query(0, 0, n - 1, minpos[i], maxpos[i]));
    for (auto v : has[i]) modify(0, 0, n - 1, v, -maxr[i]);
  }

  int startl = s, startr = s;
  while (startl > 0 && !cycleend[startl - 1]) startl--;
  while (!cycleend[startr]) startr++;

  vector<int> pdp(n), sdp(n);
  for (int i = startl + 1; i <= startr; i++){
    int l = minl[cid[i]];
    pdp[i] = (l <= startl? 0 : pdp[l - 1] + 1);
  }

  for (int i = startr - 1; i >= startl; i--){
    int r = maxr[cid[i]];
    sdp[i] = (r >= startr? 0 : sdp[r + 1] + 1);
  }

  int ans1 = INF;

  for (int i = 0; i < id; i++){
    if (minl[i] < startl || minl[i] > startr) continue;
    int cur = INF;
    for (auto x : has[i]) cur = min(cur, abs(s - x));
    ans1 = min(ans1, cur + pdp[minl[i]] + sdp[maxr[i]]);
  }

  return ans + 2 * ans1;
}

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 0 ms 212 KB Output is correct
4 Correct 0 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 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 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 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 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 212 KB Output is correct
2 Correct 1 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 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 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 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 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 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 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 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 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 0 ms 212 KB Output is correct
4 Correct 0 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 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 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 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 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 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 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 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 515 ms 108136 KB Output is correct
31 Correct 487 ms 95604 KB Output is correct
32 Correct 87 ms 8056 KB Output is correct
33 Correct 79 ms 8068 KB Output is correct
34 Correct 79 ms 8064 KB Output is correct
35 Correct 472 ms 98560 KB Output is correct
36 Correct 388 ms 90224 KB Output is correct
37 Correct 323 ms 85040 KB Output is correct
38 Correct 344 ms 84476 KB Output is correct
39 Correct 344 ms 84484 KB Output is correct
40 Correct 358 ms 84600 KB Output is correct
41 Correct 417 ms 93704 KB Output is correct
42 Correct 414 ms 88112 KB Output is correct
43 Correct 588 ms 104948 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3590'
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 0 ms 212 KB Output is correct
4 Correct 0 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 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 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 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 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 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 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 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 515 ms 108136 KB Output is correct
31 Correct 487 ms 95604 KB Output is correct
32 Correct 87 ms 8056 KB Output is correct
33 Correct 79 ms 8068 KB Output is correct
34 Correct 79 ms 8064 KB Output is correct
35 Correct 472 ms 98560 KB Output is correct
36 Correct 388 ms 90224 KB Output is correct
37 Correct 323 ms 85040 KB Output is correct
38 Correct 344 ms 84476 KB Output is correct
39 Correct 344 ms 84484 KB Output is correct
40 Correct 358 ms 84600 KB Output is correct
41 Correct 417 ms 93704 KB Output is correct
42 Correct 414 ms 88112 KB Output is correct
43 Correct 588 ms 104948 KB Output is correct
44 Incorrect 1 ms 340 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3590'
45 Halted 0 ms 0 KB -