oj.uz

Submission #600836

# Submission time Handle Problem Language Result Execution time Memory
600836 2022-07-21T08:11:01 Z vovik Werewolf (IOI18_werewolf) C++17
100 / 100
 821 ms 109944 KB 
//I wrote this code 4 u today
#include <bits/stdc++.h>

#define vc vector

#define nd node*
#define pnd pair<nd, nd>

using namespace std;
typedef long long ll;
typedef vector<ll> vll;
typedef pair<ll, ll> pll;
typedef vc<pll> vpll;
typedef vc<vll> vvll;
typedef vc<vpll> vvpll;

template<const ll MOD>
struct mod_mul : multiplies<const ll> {
    ll operator()(const ll a, const ll b) {
        return (a * b) % MOD;
    }
};


template<typename T>
inline void sort(T &a) {
    sort(a.begin(), a.end());
}

template<typename T>
inline void unique(T &a) {
    a.resize(unique(a.begin(), a.end()) - a.begin());
}

template<typename T>
inline void reverse(T &a) {
    reverse(a.begin(), a.end());
}

const ll INF = 9023372036854775808ll;
const ll MOD = 1000000007ll;

struct DSU {
    static const int MAXN = 200005;
    vc<int> down[MAXN];
    int p[MAXN], f[MAXN], s[MAXN];

    DSU() { iota(p, p + MAXN, 0); }

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

    void merge(int v, int u) {//v->u
        v = get(v), u = get(u);
        if (v == u) return;
        p[u] = v, down[v].push_back(u);
    }

    vc<int> ei;

    void dfs(int v) {
        f[v] = ei.size();
        ei.push_back(v);
        for (auto to: down[v]) dfs(to);
        s[v] = ei.size();
    }

    void build_tour() {
        for (int v = 0; v < MAXN; ++v) if (get(v) == v) dfs(v);
    }
};

int n;
vc<int> t[200005 * 4];

void build(vc<int> &x, int l = 0, int r = n - 1, int v = 1) {
    if (l == r) return void(t[v] = {x[l]});
    int mid = (l + r) / 2;
    build(x, l, mid, v * 2), build(x, mid + 1, r, v * 2 + 1);
    t[v].resize(t[v * 2].size() + t[v * 2 + 1].size());
    merge(t[v * 2].begin(), t[v * 2].end(), t[v * 2 + 1].begin(), t[v * 2 + 1].end(), t[v].begin());
}

bool check(int l_, int r_, int a, int b, int l = 0, int r = n - 1, int v = 1) {
    if (l_ <= l && r <= r_) {
        auto y = lower_bound(t[v].begin(), t[v].end(), a);
        return y != t[v].end() && *y <= b;
    }
    if (r < l_ || r_ < l) return false;
    int mid = (l + r) / 2;
    return check(l_, r_, a, b, l, mid, v * 2) || check(l_, r_, a, b, mid + 1, r, v * 2 + 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) {
    ::n = N;
    vc<vc<int>> s(N), l(N);
    DSU a, b;
    for (int i = 0; i < X.size(); ++i) {
        if (X[i] < Y[i]) swap(X[i], Y[i]);
        s[X[i]].push_back(Y[i]);
        l[Y[i]].push_back(X[i]);
    }
    vc<int> t1(S.size()), t2(S.size());
    vc<int> ord(S.size());
    iota(ord.begin(), ord.end(), 0);
    sort(ord.begin(), ord.end(), [&](const int &i, const int &j) { return R[i] < R[j]; });
    int j = 0;
    for (int v = 0; v < N; ++v) {
        for (auto to: s[v]) a.merge(v, to);
        while (j < ord.size() && R[ord[j]] == v) t1[ord[j]] = a.get(E[ord[j]]), ++j;
    }
    sort(ord.begin(), ord.end(), [&](const int &i, const int &j) { return L[i] > L[j]; }), j = 0;
    for (int v = N - 1; v >= 0; --v) {
        for (auto to: l[v]) b.merge(v, to);
        while (j < ord.size() && L[ord[j]] == v) t2[ord[j]] = b.get(S[ord[j]]), ++j;
    }
    a.build_tour(), b.build_tour();
    vc<int> ans(S.size());
    vc<int> wh(N);
    for (int i = 0; i < N; ++i) wh[b.ei[i]] = i;
    vc<int> bip(N);
    for (int i = 0; i < N; ++i) {
        bip[i] = wh[a.ei[i]];
    }
    build(bip);
    for (int i = 0; i < ans.size(); ++i) {
        ans[i] = check(a.f[t1[i]], a.s[t1[i]] - 1, b.f[t2[i]], b.s[t2[i]] - 1);
    }
    return ans;
}


#ifdef VOVA

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();
    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();
    }

    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;
}

#endif

Compilation message

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:98:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |     for (int i = 0; i < X.size(); ++i) {
      |                     ~~^~~~~~~~~~
werewolf.cpp:110:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  110 |         while (j < ord.size() && R[ord[j]] == v) t1[ord[j]] = a.get(E[ord[j]]), ++j;
      |                ~~^~~~~~~~~~~~
werewolf.cpp:115:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  115 |         while (j < ord.size() && L[ord[j]] == v) t2[ord[j]] = b.get(S[ord[j]]), ++j;
      |                ~~^~~~~~~~~~~~
werewolf.cpp:126:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  126 |     for (int i = 0; i < ans.size(); ++i) {
      |                     ~~^~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 35528 KB Output is correct
2 Correct 24 ms 35484 KB Output is correct
3 Correct 21 ms 35464 KB Output is correct
4 Correct 25 ms 35452 KB Output is correct
5 Correct 20 ms 35436 KB Output is correct
6 Correct 21 ms 35528 KB Output is correct
7 Correct 20 ms 35528 KB Output is correct
8 Correct 22 ms 35432 KB Output is correct
9 Correct 20 ms 35528 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 35528 KB Output is correct
2 Correct 24 ms 35484 KB Output is correct
3 Correct 21 ms 35464 KB Output is correct
4 Correct 25 ms 35452 KB Output is correct
5 Correct 20 ms 35436 KB Output is correct
6 Correct 21 ms 35528 KB Output is correct
7 Correct 20 ms 35528 KB Output is correct
8 Correct 22 ms 35432 KB Output is correct
9 Correct 20 ms 35528 KB Output is correct
10 Correct 30 ms 36100 KB Output is correct
11 Correct 27 ms 36032 KB Output is correct
12 Correct 42 ms 35956 KB Output is correct
13 Correct 26 ms 36192 KB Output is correct
14 Correct 48 ms 36152 KB Output is correct
15 Correct 26 ms 36200 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 676 ms 98656 KB Output is correct
2 Correct 533 ms 100828 KB Output is correct
3 Correct 643 ms 99448 KB Output is correct
4 Correct 541 ms 98780 KB Output is correct
5 Correct 615 ms 98828 KB Output is correct
6 Correct 717 ms 98684 KB Output is correct
7 Correct 660 ms 98708 KB Output is correct
8 Correct 595 ms 100764 KB Output is correct
9 Correct 599 ms 99432 KB Output is correct
10 Correct 475 ms 98784 KB Output is correct
11 Correct 508 ms 98832 KB Output is correct
12 Correct 690 ms 98776 KB Output is correct
13 Correct 647 ms 109864 KB Output is correct
14 Correct 607 ms 109868 KB Output is correct
15 Correct 658 ms 109860 KB Output is correct
16 Correct 618 ms 109796 KB Output is correct
17 Correct 737 ms 98808 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 35528 KB Output is correct
2 Correct 24 ms 35484 KB Output is correct
3 Correct 21 ms 35464 KB Output is correct
4 Correct 25 ms 35452 KB Output is correct
5 Correct 20 ms 35436 KB Output is correct
6 Correct 21 ms 35528 KB Output is correct
7 Correct 20 ms 35528 KB Output is correct
8 Correct 22 ms 35432 KB Output is correct
9 Correct 20 ms 35528 KB Output is correct
10 Correct 30 ms 36100 KB Output is correct
11 Correct 27 ms 36032 KB Output is correct
12 Correct 42 ms 35956 KB Output is correct
13 Correct 26 ms 36192 KB Output is correct
14 Correct 48 ms 36152 KB Output is correct
15 Correct 26 ms 36200 KB Output is correct
16 Correct 676 ms 98656 KB Output is correct
17 Correct 533 ms 100828 KB Output is correct
18 Correct 643 ms 99448 KB Output is correct
19 Correct 541 ms 98780 KB Output is correct
20 Correct 615 ms 98828 KB Output is correct
21 Correct 717 ms 98684 KB Output is correct
22 Correct 660 ms 98708 KB Output is correct
23 Correct 595 ms 100764 KB Output is correct
24 Correct 599 ms 99432 KB Output is correct
25 Correct 475 ms 98784 KB Output is correct
26 Correct 508 ms 98832 KB Output is correct
27 Correct 690 ms 98776 KB Output is correct
28 Correct 647 ms 109864 KB Output is correct
29 Correct 607 ms 109868 KB Output is correct
30 Correct 658 ms 109860 KB Output is correct
31 Correct 618 ms 109796 KB Output is correct
32 Correct 737 ms 98808 KB Output is correct
33 Correct 798 ms 98104 KB Output is correct
34 Correct 297 ms 55800 KB Output is correct
35 Correct 813 ms 100136 KB Output is correct
36 Correct 704 ms 99208 KB Output is correct
37 Correct 714 ms 99268 KB Output is correct
38 Correct 709 ms 99644 KB Output is correct
39 Correct 721 ms 106640 KB Output is correct
40 Correct 821 ms 106440 KB Output is correct
41 Correct 672 ms 98892 KB Output is correct
42 Correct 601 ms 99140 KB Output is correct
43 Correct 709 ms 104620 KB Output is correct
44 Correct 770 ms 99376 KB Output is correct
45 Correct 689 ms 106932 KB Output is correct
46 Correct 626 ms 106764 KB Output is correct
47 Correct 794 ms 109944 KB Output is correct
48 Correct 690 ms 109828 KB Output is correct
49 Correct 630 ms 109940 KB Output is correct
50 Correct 621 ms 109876 KB Output is correct
51 Correct 733 ms 105760 KB Output is correct
52 Correct 738 ms 105736 KB Output is correct