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답안 #546365

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
546365 2022-04-07T11:24:25 Z hoanghq2004 늑대인간 (IOI18_werewolf) C++14
100 / 100
 807 ms 175140 KB 
#include <bits/stdc++.h>
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include "werewolf.h"

using namespace __gnu_pbds;
using namespace std;

template <typename T>
using ordered_set = tree <T, null_type, less <T>, rb_tree_tag, tree_order_statistics_node_update>;

const int N = 4e5 + 10;

vector <int> g[N];
int a[N];

struct DSU {
    int n, ord[N];
    int in[N], out[N];
    int root[N];
    vector <int> e[N];
    DSU(int _n) {
        n = _n;
        for (int i = 0; i < n; ++i) root[i] = i;
    }
    int Find(int u) {
        return (u == root[u] ? u : root[u] = Find(root[u]));
    }
    void Union(int u, int v) {
        if ((u = Find(u)) == (v = Find(v))) return;
        e[n].push_back(u);
        e[n].push_back(v);
        root[u] = n, root[v] = n;
        root[n] = n;
        ++n;
    }
    int ti = 0;
    void dfs(int u) {
        if (e[u].size()) {
            in[u] = 1e9, out[u] = - 1e9;
            for (auto v: e[u]) dfs(v), in[u] = min(in[u], in[v]), out[u] = max(out[u], out[v]);
        } else {
            ord[ti] = u;
            in[u] = out[u] = ti;
            ++ti;
        }
    }
    void run() {
        dfs(n - 1);
    }
};

int node[N][2];
vector <pair <int, int> > QL[N], QR[N];

vector <int> st[N * 4];

void build(int id, int L, int R) {
    if (L == R) {
        st[id].push_back(a[L]);
        return;
    }
    int mid = L + R >> 1;
    build(id * 2, L, mid);
    build(id * 2 + 1, mid + 1, R);
    st[id].resize(R - L + 1);
    merge(st[id * 2].begin(), st[id * 2].end(), st[id * 2 + 1].begin(), st[id * 2 + 1].end(), st[id].begin());
}

int get(int id, int L, int R, int u, int v, int x, int y) {
    if (u > R || L > v) return 0;
    if (u <= L && R <= v) {
        auto iter = lower_bound(st[id].begin(), st[id].end(), x);
        if (iter != st[id].end() && *iter <= y) return 1;
        return 0;
    }
    int mid = L + R >> 1;
    return get(id * 2, L, mid, u, v, x, y) || get(id * 2 + 1, mid + 1, R, u, v, x, y);
}

vector<int> check_validity(int n, vector<int> X, vector<int> Y, vector<int> S, vector<int> E, vector<int> L, vector<int> R) {
    int m = X.size();
    int q = S.size();
    for (int i = 0; i < m; ++i) {
        int u = X[i], v = Y[i];
        g[u].push_back(v);
        g[v].push_back(u);
    }
    vector<int> A(q);
    for (int i = 0; i < q; ++i) {
        int u = S[i], v = E[i], l = L[i], r = R[i];
        QR[l].push_back({u, i});
        QL[r].push_back({v, i});
    }
    DSU D1(n), D2(n);
    for (int u = 0; u < n; ++u) {
        for (auto v: g[u]) {
            if (u > v) D1.Union(u, v);
        }
        for (auto [x, i]: QL[u]) node[i][0] = D1.Find(x);
    }
    for (int u = n - 1; u >= 0; --u) {
        for (auto v: g[u]) {
            if (u < v) D2.Union(u, v);
        }
        for (auto [x, i]: QR[u]) node[i][1] = D2.Find(x);
    }
    D1.run();
    D2.run();
    for (int i = 0; i < n; ++i) a[i] = D2.in[D1.ord[i]];
    build(1, 0, n - 1);
    for (int i = 0; i < q; ++i) {
        A[i] = get(1, 0, n - 1, D1.in[node[i][0]], D1.out[node[i][0]], D2.in[node[i][1]], D2.out[node[i][1]]);
    }
    return A;
}
//namespace {
//
//int read_int() {
//  int x;
//  if (scanf("%d", &x) != 1) {
//    fprintf(stderr, "Error while reading input\n");
//    exit(1);
//  }
//  return x;
//}
//
//}  // namespace
//
//int main() {
//  int N = read_int();
//  int M = read_int();
//  int Q = read_int();
//  std::vector<int> X(M), Y(M), S(Q), E(Q), L(Q), R(Q);
//  for (int j = 0; j < M; ++j) {
//    X[j] = read_int();
//    Y[j] = read_int();
//  }
//  for (int i = 0; i < Q; ++i) {
//    S[i] = read_int();
//    E[i] = read_int();
//    L[i] = read_int();
//    R[i] = read_int();
//  }
//
//  std::vector<int> A = check_validity(N, X, Y, S, E, L, R);
//  for (size_t i = 0; i < A.size(); ++i) {
//    printf("%d\n", A[i]);
//  }
//  return 0;
//}

Compilation message

werewolf.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
werewolf.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      | 
werewolf.cpp: In function 'void build(int, int, int)':
werewolf.cpp:65:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |     int mid = L + R >> 1;
      |               ~~^~~
werewolf.cpp: In function 'int get(int, int, int, int, int, int, int)':
werewolf.cpp:79:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   79 |     int mid = L + R >> 1;
      |               ~~^~~
werewolf.cpp: In function 'std::vector<int> check_validity(int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
werewolf.cpp:102:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  102 |         for (auto [x, i]: QL[u]) node[i][0] = D1.Find(x);
      |                   ^
werewolf.cpp:108:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  108 |         for (auto [x, i]: QR[u]) node[i][1] = D2.Find(x);
      |                   ^

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 97356 KB Output is correct
2 Correct 47 ms 97356 KB Output is correct
3 Correct 45 ms 97276 KB Output is correct
4 Correct 46 ms 97356 KB Output is correct
5 Correct 45 ms 97364 KB Output is correct
6 Correct 48 ms 97364 KB Output is correct
7 Correct 45 ms 97372 KB Output is correct
8 Correct 47 ms 97304 KB Output is correct
9 Correct 46 ms 97288 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 97356 KB Output is correct
2 Correct 47 ms 97356 KB Output is correct
3 Correct 45 ms 97276 KB Output is correct
4 Correct 46 ms 97356 KB Output is correct
5 Correct 45 ms 97364 KB Output is correct
6 Correct 48 ms 97364 KB Output is correct
7 Correct 45 ms 97372 KB Output is correct
8 Correct 47 ms 97304 KB Output is correct
9 Correct 46 ms 97288 KB Output is correct
10 Correct 50 ms 98296 KB Output is correct
11 Correct 51 ms 98260 KB Output is correct
12 Correct 58 ms 98124 KB Output is correct
13 Correct 57 ms 98268 KB Output is correct
14 Correct 55 ms 98312 KB Output is correct
15 Correct 51 ms 98252 KB Output is correct

Subtask #3
34.0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Correct 640 ms 159736 KB Output is correct
2 Correct 514 ms 163052 KB Output is correct
3 Correct 527 ms 169284 KB Output is correct
4 Correct 618 ms 168424 KB Output is correct
5 Correct 612 ms 168332 KB Output is correct
6 Correct 653 ms 168260 KB Output is correct
7 Correct 555 ms 165736 KB Output is correct
8 Correct 533 ms 171608 KB Output is correct
9 Correct 520 ms 168260 KB Output is correct
10 Correct 481 ms 167152 KB Output is correct
11 Correct 480 ms 167572 KB Output is correct
12 Correct 596 ms 168132 KB Output is correct
13 Correct 597 ms 171460 KB Output is correct
14 Correct 586 ms 171520 KB Output is correct
15 Correct 569 ms 171496 KB Output is correct
16 Correct 588 ms 171544 KB Output is correct
17 Correct 578 ms 165968 KB Output is correct

Subtask #4
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 97356 KB Output is correct
2 Correct 47 ms 97356 KB Output is correct
3 Correct 45 ms 97276 KB Output is correct
4 Correct 46 ms 97356 KB Output is correct
5 Correct 45 ms 97364 KB Output is correct
6 Correct 48 ms 97364 KB Output is correct
7 Correct 45 ms 97372 KB Output is correct
8 Correct 47 ms 97304 KB Output is correct
9 Correct 46 ms 97288 KB Output is correct
10 Correct 50 ms 98296 KB Output is correct
11 Correct 51 ms 98260 KB Output is correct
12 Correct 58 ms 98124 KB Output is correct
13 Correct 57 ms 98268 KB Output is correct
14 Correct 55 ms 98312 KB Output is correct
15 Correct 51 ms 98252 KB Output is correct
16 Correct 640 ms 159736 KB Output is correct
17 Correct 514 ms 163052 KB Output is correct
18 Correct 527 ms 169284 KB Output is correct
19 Correct 618 ms 168424 KB Output is correct
20 Correct 612 ms 168332 KB Output is correct
21 Correct 653 ms 168260 KB Output is correct
22 Correct 555 ms 165736 KB Output is correct
23 Correct 533 ms 171608 KB Output is correct
24 Correct 520 ms 168260 KB Output is correct
25 Correct 481 ms 167152 KB Output is correct
26 Correct 480 ms 167572 KB Output is correct
27 Correct 596 ms 168132 KB Output is correct
28 Correct 597 ms 171460 KB Output is correct
29 Correct 586 ms 171520 KB Output is correct
30 Correct 569 ms 171496 KB Output is correct
31 Correct 588 ms 171544 KB Output is correct
32 Correct 578 ms 165968 KB Output is correct
33 Correct 807 ms 169168 KB Output is correct
34 Correct 284 ms 134476 KB Output is correct
35 Correct 706 ms 171804 KB Output is correct
36 Correct 704 ms 168860 KB Output is correct
37 Correct 689 ms 171076 KB Output is correct
38 Correct 701 ms 169392 KB Output is correct
39 Correct 740 ms 175140 KB Output is correct
40 Correct 677 ms 174828 KB Output is correct
41 Correct 616 ms 170572 KB Output is correct
42 Correct 515 ms 167556 KB Output is correct
43 Correct 663 ms 175116 KB Output is correct
44 Correct 646 ms 171160 KB Output is correct
45 Correct 637 ms 174512 KB Output is correct
46 Correct 557 ms 174280 KB Output is correct
47 Correct 588 ms 171960 KB Output is correct
48 Correct 614 ms 171468 KB Output is correct
49 Correct 573 ms 171664 KB Output is correct
50 Correct 578 ms 171424 KB Output is correct
51 Correct 628 ms 174668 KB Output is correct
52 Correct 647 ms 174564 KB Output is correct