oj.uz

Submission #803099

# Submission time Handle Problem Language Result Execution time Memory
803099 2023-08-02T21:47:03 Z lukameladze Passport (JOI23_passport) C++17
100 / 100
 678 ms 88028 KB 
# include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define pii pair <int,int>
#define pb push_back
const int N = 3e5 + 5;
int n, l[N], r[N];
pii tree[4 * N];
multiset <pii> ms[4 * N];
void update(int node, int le, int ri, int idx, int val, int id) {
  if (le > idx || ri < idx) return ;
  if (le == ri) {
    // cout<<"upd "<<le<<" "<<ri<<" "<<node<<"\n";
    if (val == 0) {
      if (!ms[node].size()) {
        // cout<<node<<" "<<idx<<" "<<val<<" "<<id<<"\n";
        // exit(0);
        assert(false);
      }
      assert(ms[node].size());
      ms[node].erase(--ms[node].end());
      if (!ms[node].size()) {
        tree[node] = {0, 0}; return ;
      }
    } 
    if (val != 0) ms[node].insert({val, id});
    auto it = --ms[node].end();
    tree[node] = {(*it).f, (*it).s};
    return ;
  }
  int mid = (le + ri) / 2;
  update(2 * node, le, mid, idx, val, id);
  update(2 * node + 1, mid + 1, ri, idx, val, id);
  tree[node] = max(tree[2 * node], tree[2 * node + 1]);
}
pii getans(int node, int le, int ri, int start, int end) {
  if (le > end || ri < start) return {0, 0};
  if (le >= start && ri <= end) return tree[node];
  int mid = (le + ri) / 2;
  return max(getans(2 * node, le, mid, start, end), getans(2 * node + 1, mid + 1, ri ,start, end));
}
int dp[2][N];
void bfs(int a, int ty) {
  for (int i = 0; i < 4 * N; i++) {
    tree[i] = {0, 0}; 
    ms[i].clear();
  }
  for (int i = 1; i <= n; i++) {
    if (i == a) continue;
    dp[ty][i] = 1e9;
    update(1, 1, n, l[i], r[i], i);
  }

  queue <int> q;
  q.push(a);
  dp[ty][a] = 0;
  while (!q.empty()) {
    int x = q.front();
    q.pop();
    while (getans(1, 1, n, 1, x).f >= x) {
      pii sth = getans(1, 1, n, 1, x);
      q.push(sth.s);
      dp[ty][sth.s] = dp[ty][x] + 1;
      update(1, 1, n, l[sth.s], 0, sth.s);
    }
  }
}

int tree_mn[4 * N];
void upd_mn(int node, int le, int ri, int idx, int val) {
  if (le > idx || ri < idx) return ;
  if (le == ri) {
    tree_mn[node] = val; return ;
  }
  int mid = (le + ri) / 2;
  upd_mn(2 * node, le, mid, idx,val);
  upd_mn(2 * node + 1, mid + 1, ri, idx,val);
  tree_mn[node] = min(tree_mn[2 * node], tree_mn[2 * node + 1]);
}
int get_mn(int node, int le, int ri, int start, int end) {
  if (le > end || ri < start) return 1e9;
  if (le >= start && ri <= end) return tree_mn[node];
  int mid = (le + ri) / 2;
  return min(get_mn(2 * node, le ,mid, start, end), get_mn(2 * node + 1, mid + 1, ri, start, end));
}
signed main() {
  std::ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
  cin>>n;
  for (int i = 1; i <= n; i++) {
    cin>>l[i]>>r[i];
  }
  bfs(1, 0);
  bfs(n, 1);
  vector <pii> vec;
  for (int i = 1; i <= n; i++) {
    vec.pb({dp[0][i] + dp[1][i] - (i != 1 && i != n), i});
  }
  sort(vec.begin(), vec.end());
  for (pii sth : vec) {
    upd_mn(1, 1, n, sth.s, sth.f);
  }
  vector <int> res(n + 5, 0);
  for (int i = 0; i < (int)vec.size(); i++) {
    int id = vec[i].s;
    res[id] = min(vec[i].f, get_mn(1, 1, n, l[id], r[id]) + 1);
    upd_mn(1, 1, n, id, res[id]);
  }
  int q;
  cin>>q;
  while(q--) {
    int idx; cin>>idx;
    cout<<(res[idx] >= 1e9 ? -1 : res[idx])<<"\n";
  }
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 66028 KB Output is correct
2 Correct 41 ms 66052 KB Output is correct
3 Correct 41 ms 66024 KB Output is correct
4 Correct 656 ms 84156 KB Output is correct
5 Correct 447 ms 85304 KB Output is correct
6 Correct 432 ms 83136 KB Output is correct
7 Correct 371 ms 82020 KB Output is correct
8 Correct 244 ms 80784 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 65996 KB Output is correct
2 Correct 42 ms 66100 KB Output is correct
3 Correct 41 ms 66084 KB Output is correct
4 Correct 42 ms 66068 KB Output is correct
5 Correct 48 ms 66080 KB Output is correct
6 Correct 42 ms 66068 KB Output is correct
7 Correct 40 ms 66004 KB Output is correct
8 Correct 41 ms 66080 KB Output is correct
9 Correct 42 ms 66036 KB Output is correct
10 Correct 42 ms 66000 KB Output is correct
11 Correct 50 ms 66088 KB Output is correct
12 Correct 47 ms 66072 KB Output is correct
13 Correct 49 ms 66112 KB Output is correct
14 Correct 41 ms 66080 KB Output is correct
15 Correct 42 ms 66104 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 65996 KB Output is correct
2 Correct 42 ms 66100 KB Output is correct
3 Correct 41 ms 66084 KB Output is correct
4 Correct 42 ms 66068 KB Output is correct
5 Correct 48 ms 66080 KB Output is correct
6 Correct 42 ms 66068 KB Output is correct
7 Correct 40 ms 66004 KB Output is correct
8 Correct 41 ms 66080 KB Output is correct
9 Correct 42 ms 66036 KB Output is correct
10 Correct 42 ms 66000 KB Output is correct
11 Correct 50 ms 66088 KB Output is correct
12 Correct 47 ms 66072 KB Output is correct
13 Correct 49 ms 66112 KB Output is correct
14 Correct 41 ms 66080 KB Output is correct
15 Correct 42 ms 66104 KB Output is correct
16 Correct 45 ms 66252 KB Output is correct
17 Correct 46 ms 66192 KB Output is correct
18 Correct 53 ms 66236 KB Output is correct
19 Correct 53 ms 66380 KB Output is correct
20 Correct 43 ms 66268 KB Output is correct
21 Correct 49 ms 66260 KB Output is correct
22 Correct 43 ms 66256 KB Output is correct
23 Correct 43 ms 66264 KB Output is correct
24 Correct 44 ms 66288 KB Output is correct

Subtask #4
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 65996 KB Output is correct
2 Correct 42 ms 66100 KB Output is correct
3 Correct 41 ms 66084 KB Output is correct
4 Correct 42 ms 66068 KB Output is correct
5 Correct 48 ms 66080 KB Output is correct
6 Correct 42 ms 66068 KB Output is correct
7 Correct 40 ms 66004 KB Output is correct
8 Correct 41 ms 66080 KB Output is correct
9 Correct 42 ms 66036 KB Output is correct
10 Correct 42 ms 66000 KB Output is correct
11 Correct 50 ms 66088 KB Output is correct
12 Correct 47 ms 66072 KB Output is correct
13 Correct 49 ms 66112 KB Output is correct
14 Correct 41 ms 66080 KB Output is correct
15 Correct 42 ms 66104 KB Output is correct
16 Correct 45 ms 66252 KB Output is correct
17 Correct 46 ms 66192 KB Output is correct
18 Correct 53 ms 66236 KB Output is correct
19 Correct 53 ms 66380 KB Output is correct
20 Correct 43 ms 66268 KB Output is correct
21 Correct 49 ms 66260 KB Output is correct
22 Correct 43 ms 66256 KB Output is correct
23 Correct 43 ms 66264 KB Output is correct
24 Correct 44 ms 66288 KB Output is correct
25 Correct 40 ms 66092 KB Output is correct
26 Correct 41 ms 65988 KB Output is correct
27 Correct 47 ms 66236 KB Output is correct
28 Correct 53 ms 66252 KB Output is correct
29 Correct 47 ms 66212 KB Output is correct
30 Correct 44 ms 66204 KB Output is correct
31 Correct 45 ms 66232 KB Output is correct

Subtask #5
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 66028 KB Output is correct
2 Correct 41 ms 66052 KB Output is correct
3 Correct 41 ms 66024 KB Output is correct
4 Correct 656 ms 84156 KB Output is correct
5 Correct 447 ms 85304 KB Output is correct
6 Correct 432 ms 83136 KB Output is correct
7 Correct 371 ms 82020 KB Output is correct
8 Correct 244 ms 80784 KB Output is correct
9 Correct 42 ms 65996 KB Output is correct
10 Correct 42 ms 66100 KB Output is correct
11 Correct 41 ms 66084 KB Output is correct
12 Correct 42 ms 66068 KB Output is correct
13 Correct 48 ms 66080 KB Output is correct
14 Correct 42 ms 66068 KB Output is correct
15 Correct 40 ms 66004 KB Output is correct
16 Correct 41 ms 66080 KB Output is correct
17 Correct 42 ms 66036 KB Output is correct
18 Correct 42 ms 66000 KB Output is correct
19 Correct 50 ms 66088 KB Output is correct
20 Correct 47 ms 66072 KB Output is correct
21 Correct 49 ms 66112 KB Output is correct
22 Correct 41 ms 66080 KB Output is correct
23 Correct 42 ms 66104 KB Output is correct
24 Correct 45 ms 66252 KB Output is correct
25 Correct 46 ms 66192 KB Output is correct
26 Correct 53 ms 66236 KB Output is correct
27 Correct 53 ms 66380 KB Output is correct
28 Correct 43 ms 66268 KB Output is correct
29 Correct 49 ms 66260 KB Output is correct
30 Correct 43 ms 66256 KB Output is correct
31 Correct 43 ms 66264 KB Output is correct
32 Correct 44 ms 66288 KB Output is correct
33 Correct 40 ms 66092 KB Output is correct
34 Correct 41 ms 65988 KB Output is correct
35 Correct 47 ms 66236 KB Output is correct
36 Correct 53 ms 66252 KB Output is correct
37 Correct 47 ms 66212 KB Output is correct
38 Correct 44 ms 66204 KB Output is correct
39 Correct 45 ms 66232 KB Output is correct
40 Correct 678 ms 86888 KB Output is correct
41 Correct 466 ms 88028 KB Output is correct
42 Correct 474 ms 85404 KB Output is correct
43 Correct 504 ms 85048 KB Output is correct
44 Correct 431 ms 85888 KB Output is correct
45 Correct 408 ms 85376 KB Output is correct
46 Correct 230 ms 74096 KB Output is correct
47 Correct 451 ms 84736 KB Output is correct
48 Correct 520 ms 86592 KB Output is correct