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답안 #880285

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
880285 2023-11-29T06:05:07 Z NeroZein 늑대인간 (IOI18_werewolf) C++17
100 / 100
 796 ms 192700 KB 
#include "werewolf.h"
#include "bits/stdc++.h"

using namespace std; 

const int LOG = 20; 
const int MAX_N = 4e5 + 5; 

int n[2]; 
int p[MAX_N][2];
int val[MAX_N][2];
vector<int> adj[MAX_N], g[MAX_N][2];

int get(int v, int ver) {
  return p[v][ver] = (p[v][ver] == v ? v : get(p[v][ver], ver)); 
}

void unite(int u, int v, int ver) {
  u = get(u, ver), v = get(v, ver);
  if (u == v) return;  
  int puv = n[ver]++; 
  g[puv][ver].push_back(u);
  g[puv][ver].push_back(v);
  p[puv][ver] = p[u][ver] = p[v][ver] = puv; 
  if (ver == 0) {
    val[puv][ver] = min(val[u][ver], val[v][ver]);     
  } else {
    val[puv][ver] = max(val[u][ver], val[v][ver]);     
  }
}

int cnt[2];
int dep[MAX_N][2], up[MAX_N][2][LOG]; 
int lx[MAX_N][2], rx[MAX_N][2], owner[MAX_N][2]; 

void dfs(int v, int ver) {
  lx[v][ver] = ++cnt[ver]; 
  owner[cnt[ver]][ver] = v; 
  for (int u : g[v][ver]) {
    dep[u][ver] = dep[v][ver] + 1; 
    up[u][ver][0] = v; 
    for (int j = 1; j < LOG; ++j) {
      up[u][ver][j] = up[up[u][ver][j - 1]][ver][j - 1]; 
    }
    dfs(u, ver); 
  }
  rx[v][ver] = cnt[ver]; 
}

int tree[MAX_N];
int common[MAX_N];
vector<array<int, 4>> qs[MAX_N];

void upd(int i) {
  while (i < MAX_N) {
    tree[i]++;
    i += i & -i;
  }
}

int query(int i) {
  int ret = 0;
  while (i) {
    ret += tree[i];
    i -= i & -i; 
  }
  return ret;
}

int query(int l, int r) {
  return query(r) - query(l - 1); 
}

vector<int> check_validity(int N, vector<int> X, vector<int> Y,
                                  vector<int> S, vector<int> E,
                                  vector<int> L, vector<int> R) {
  for (int i = 0; i < (int) X.size(); ++i) {
    adj[X[i]].push_back(Y[i]);
    adj[Y[i]].push_back(X[i]);
  }
  n[0] = n[1] = N; 
  for (int i = 0; i < N; ++i) {
    p[i][0] = p[i][1] = val[i][0] = val[i][1] = i; 
  }
  for (int v = N - 1; v >= 0; --v) {
    for (int u : adj[v]) {
      if (u > v) {
        unite(u, v, 0); 
      }
    }
  }
  for (int v = 0; v < N; ++v) {
    for (int u : adj[v]) {
      if (u < v) {
        unite(u, v, 1); 
      }
    }
  }
  assert(n[0] == n[1] && n[0] == N * 2 - 1); 
  dfs(n[0] - 1, 0); dfs(n[1] - 1, 1); 
  int Q = (int) S.size(); 
  
  for (int i = 0; i < Q; ++i) {
    if (S[i] < L[i] || E[i] > R[i]) continue; 
    vector<int> r = {S[i], E[i]}; 
    for (int j = LOG - 1; j >= 0; --j) {
      if ((1 << j) <= dep[r[0]][0] && val[up[r[0]][0][j]][0] >= L[i]) {
        r[0] = up[r[0]][0][j];
      }
      if ((1 << j) <= dep[r[1]][1] && up[r[1]][1][j] && val[up[r[1]][1][j]][1] <= R[i]) {
        r[1] = up[r[1]][1][j]; 
      }
    }
    int l1 = lx[r[0]][0], r1 = rx[r[0]][0]; 
    int l2 = lx[r[1]][1], r2 = rx[r[1]][1]; 
    qs[l2 - 1].push_back({l1, r1, -1, i});
    qs[r2].push_back({l1, r1, 1, i}); 
  }
  for (int i = 1; i <= n[1]; ++i) {//eulerian 
    if (owner[i][1] < N) {
      upd(lx[owner[i][1]][0]); 
    }
    for (auto [l1, r1, v, j] : qs[i]) {
      common[j] += query(l1, r1) * v; 
    }
  }
  
  vector<int> A(Q); 
  for (int i = 0; i < Q; ++i) {
    A[i] = common[i] > 0; 
  }
  return A;
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 51800 KB Output is correct
2 Correct 10 ms 51936 KB Output is correct
3 Correct 11 ms 51992 KB Output is correct
4 Correct 10 ms 51804 KB Output is correct
5 Correct 10 ms 53852 KB Output is correct
6 Correct 10 ms 51804 KB Output is correct
7 Correct 10 ms 51804 KB Output is correct
8 Correct 10 ms 51892 KB Output is correct
9 Correct 11 ms 51800 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 51800 KB Output is correct
2 Correct 10 ms 51936 KB Output is correct
3 Correct 11 ms 51992 KB Output is correct
4 Correct 10 ms 51804 KB Output is correct
5 Correct 10 ms 53852 KB Output is correct
6 Correct 10 ms 51804 KB Output is correct
7 Correct 10 ms 51804 KB Output is correct
8 Correct 10 ms 51892 KB Output is correct
9 Correct 11 ms 51800 KB Output is correct
10 Correct 17 ms 53596 KB Output is correct
11 Correct 16 ms 53596 KB Output is correct
12 Correct 15 ms 53392 KB Output is correct
13 Correct 15 ms 53192 KB Output is correct
14 Correct 15 ms 53700 KB Output is correct
15 Correct 16 ms 53596 KB Output is correct

Subtask #3
34.0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Correct 656 ms 169396 KB Output is correct
2 Correct 645 ms 179840 KB Output is correct
3 Correct 560 ms 172432 KB Output is correct
4 Correct 531 ms 169316 KB Output is correct
5 Correct 539 ms 169300 KB Output is correct
6 Correct 602 ms 169296 KB Output is correct
7 Correct 580 ms 166992 KB Output is correct
8 Correct 606 ms 180516 KB Output is correct
9 Correct 529 ms 172976 KB Output is correct
10 Correct 438 ms 167872 KB Output is correct
11 Correct 443 ms 169044 KB Output is correct
12 Correct 512 ms 168364 KB Output is correct
13 Correct 745 ms 179796 KB Output is correct
14 Correct 753 ms 179544 KB Output is correct
15 Correct 728 ms 179616 KB Output is correct
16 Correct 743 ms 179868 KB Output is correct
17 Correct 586 ms 167176 KB Output is correct

Subtask #4
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 51800 KB Output is correct
2 Correct 10 ms 51936 KB Output is correct
3 Correct 11 ms 51992 KB Output is correct
4 Correct 10 ms 51804 KB Output is correct
5 Correct 10 ms 53852 KB Output is correct
6 Correct 10 ms 51804 KB Output is correct
7 Correct 10 ms 51804 KB Output is correct
8 Correct 10 ms 51892 KB Output is correct
9 Correct 11 ms 51800 KB Output is correct
10 Correct 17 ms 53596 KB Output is correct
11 Correct 16 ms 53596 KB Output is correct
12 Correct 15 ms 53392 KB Output is correct
13 Correct 15 ms 53192 KB Output is correct
14 Correct 15 ms 53700 KB Output is correct
15 Correct 16 ms 53596 KB Output is correct
16 Correct 656 ms 169396 KB Output is correct
17 Correct 645 ms 179840 KB Output is correct
18 Correct 560 ms 172432 KB Output is correct
19 Correct 531 ms 169316 KB Output is correct
20 Correct 539 ms 169300 KB Output is correct
21 Correct 602 ms 169296 KB Output is correct
22 Correct 580 ms 166992 KB Output is correct
23 Correct 606 ms 180516 KB Output is correct
24 Correct 529 ms 172976 KB Output is correct
25 Correct 438 ms 167872 KB Output is correct
26 Correct 443 ms 169044 KB Output is correct
27 Correct 512 ms 168364 KB Output is correct
28 Correct 745 ms 179796 KB Output is correct
29 Correct 753 ms 179544 KB Output is correct
30 Correct 728 ms 179616 KB Output is correct
31 Correct 743 ms 179868 KB Output is correct
32 Correct 586 ms 167176 KB Output is correct
33 Correct 743 ms 172428 KB Output is correct
34 Correct 226 ms 92076 KB Output is correct
35 Correct 796 ms 179540 KB Output is correct
36 Correct 690 ms 171308 KB Output is correct
37 Correct 787 ms 177884 KB Output is correct
38 Correct 704 ms 172780 KB Output is correct
39 Correct 775 ms 192020 KB Output is correct
40 Correct 760 ms 179860 KB Output is correct
41 Correct 618 ms 174616 KB Output is correct
42 Correct 528 ms 169556 KB Output is correct
43 Correct 749 ms 184456 KB Output is correct
44 Correct 688 ms 177116 KB Output is correct
45 Correct 698 ms 192700 KB Output is correct
46 Correct 704 ms 192196 KB Output is correct
47 Correct 730 ms 179836 KB Output is correct
48 Correct 746 ms 179596 KB Output is correct
49 Correct 732 ms 179792 KB Output is correct
50 Correct 723 ms 179628 KB Output is correct
51 Correct 674 ms 181600 KB Output is correct
52 Correct 713 ms 181664 KB Output is correct