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답안 #568349

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
568349 2022-05-25T08:58:27 Z elazarkoren 늑대인간 (IOI18_werewolf) C++17
100 / 100
 2225 ms 202212 KB 
#include <bits/stdc++.h>
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define chkmin(a, b) a = min(a, b)
#define chkmax(a, b) a = max(a, b)
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> pii;
typedef vector<pii> vii;

const int MAX_N = 4e5 + 5;

struct Dsu {
    int n;
    vi loga, par, tim;
    vvi dp, tree;
    vi l, r;
    Dsu() {}
    Dsu(int n): n(n) {
        par.resize(n);
        iota(all(par), 0);
        dp.resize(1, vi(n));
        tree.resize(n);
        tim.resize(n);
    }
    inline void Add(int t) {
        par.push_back(n), dp[0].push_back(n);
        tree.push_back({});
        tim.push_back(t);
        n++;
    }
    int Find(int i) {
        return par[i] == i ? i : par[i] = Find(par[i]);
    }
    void Union(int a, int b, int t) {
        int pa = Find(a), pb = Find(b);
        if (pa == pb) return;
        dp[0][pa] = dp[0][pb] = n;
        par[pa] = par[pb] = n;
        Add(t);
        tree.back().push_back(pa);
        tree.back().push_back(pb);
    }
    void PreOrder(int node, int &t) {
        if (tree[node].empty()) {
            l[node] = t++;
            r[node] = t;
            return;
        }
        l[node] = n, r[node] = 0;
        for (int neighbor : tree[node]) {
            PreOrder(neighbor, t);
            chkmin(l[node], l[neighbor]), chkmax(r[node], r[neighbor]);
        }
    }
    void Build() {
        loga.resize(n + 1);
        for (int i = 2; i <= n; i++) loga[i] = loga[i >> 1] + 1;
        dp.resize(loga[n] + 1, vi(n));
        for (int i = 1; i <= loga[n]; i++) {
            for (int j = 0; j < n; j++) {
                dp[i][j] = dp[i - 1][dp[i - 1][j]];
            }
        }
        int t = 0;
        l.resize(n), r.resize(n);
        PreOrder(n - 1, t);
    }
    int Jump(int node, int t) {
        for (int i = loga[n]; i >= 0; i--) {
            if (tim[dp[i][node]] <= t) {
                node = dp[i][node];
            }
        }
        return node;
    }
};

struct Seg {
    vi seg, lp, rp;
    Seg() {Add();}
    inline void Add() {
        seg.push_back(0), lp.push_back(0), rp.push_back(0);
    }
    int update(int i, int ind, int l = 0, int r = MAX_N) {
        int copy = seg.size();
        Add();
        seg[copy] = seg[ind];
        lp[copy] = lp[ind], rp[copy] = rp[ind];
        if (l + 1 == r) {
            seg[copy] = 1;
            return copy;
        }
        if (i < (l + r) >> 1) {
            if (!lp[ind]) {
                lp[ind] = seg.size();
                Add();
            }
            int y = update(i, lp[ind], l, (l + r) >> 1);
            lp[copy] = y;
        } else {
            if (!rp[ind]) {
                rp[ind] = seg.size();
                Add();
            }
            int y = update(i, rp[ind],(l + r) >> 1, r);
            rp[copy] = y;
        }
        seg[copy]++;
        return copy;
    }
    int query(int a, int b, int ind, int l = 0, int r = MAX_N) {
        if (a <= l && r <= b) return seg[ind];
        if (r <= a || b <= l) return 0;
        return (lp[ind] ? query(a, b, lp[ind], l, (l + r) >> 1) : 0) +
               (rp[ind] ? query(a, b, rp[ind], (l + r) >> 1, r) : 0);
    }
};

Seg seg = Seg();

int n;
int ind[MAX_N];
int roots[MAX_N];

inline int Sum(int x1, int y1, int x2, int y2) {
    int v1 = seg.query(y1, y2, roots[x2]), v2 = seg.query(y1, y2, roots[x1]);
    return v1 - v2;
}

vi check_validity(int N, vi X, vi Y, vi s, vi e, vi l, vi r) {
    n = N;
    int m = X.size();
    iota(ind, ind + m, 0);
    Dsu d_min(n), d_max(n);
    sort(ind, ind + m, [&] (int i, int j) {
        return max(X[i], Y[i]) < max(X[j], Y[j]);
    });
    for (int i = 0; i < m; i++) {
        d_min.Union(X[ind[i]], Y[ind[i]], max(X[ind[i]], Y[ind[i]]));
    }
    sort(ind, ind + m, [&] (int i, int j) {
        return min(X[i], Y[i]) > min(X[j], Y[j]);
    });
    for (int i = 0; i < m; i++) {
        d_max.Union(X[ind[i]], Y[ind[i]], n - min(X[ind[i]], Y[ind[i]]));
    }
    d_min.Build(), d_max.Build();
    vii points(n);
    for (int i = 0; i < n; i++) {
        points[i] = {d_min.l[i], d_max.l[i]};
    }
    sort(all(points));
    for (int i = 0; i < n; i++) {
        roots[i + 1] = seg.update(points[i].y, roots[i]);
    }
    int q = s.size();
    vi ans(q);
    for (int i = 0; i < q; i++) {
        int t_min = r[i], t_max = n - l[i];
        int v1 = d_min.Jump(e[i], t_min), v2 = d_max.Jump(s[i], t_max);
        int x1 = d_min.l[v1], x2 = d_min.r[v1], y1 = d_max.l[v2], y2 = d_max.r[v2];
        ans[i] = Sum(x1, y1, x2, y2) != 0;
    }
    return ans;
}
//6 6 3
//5 1
//1 2
//1 3
//3 4
//3 0
//5 2
//4 2 1 2
//4 2 2 2
//5 4 3 4

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 304 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 304 KB Output is correct
10 Correct 10 ms 2892 KB Output is correct
11 Correct 9 ms 2904 KB Output is correct
12 Correct 10 ms 2884 KB Output is correct
13 Correct 10 ms 3036 KB Output is correct
14 Correct 9 ms 3020 KB Output is correct
15 Correct 9 ms 3016 KB Output is correct

Subtask #3
34.0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1473 ms 185124 KB Output is correct
2 Correct 1664 ms 196352 KB Output is correct
3 Correct 1487 ms 194488 KB Output is correct
4 Correct 1426 ms 193732 KB Output is correct
5 Correct 1465 ms 193876 KB Output is correct
6 Correct 1626 ms 193556 KB Output is correct
7 Correct 1320 ms 193536 KB Output is correct
8 Correct 1569 ms 196596 KB Output is correct
9 Correct 868 ms 194516 KB Output is correct
10 Correct 713 ms 193732 KB Output is correct
11 Correct 705 ms 193860 KB Output is correct
12 Correct 723 ms 193752 KB Output is correct
13 Correct 1767 ms 196292 KB Output is correct
14 Correct 1768 ms 196324 KB Output is correct
15 Correct 1720 ms 196336 KB Output is correct
16 Correct 1665 ms 196312 KB Output is correct
17 Correct 1354 ms 193828 KB Output is correct

Subtask #4
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 304 KB Output is correct
10 Correct 10 ms 2892 KB Output is correct
11 Correct 9 ms 2904 KB Output is correct
12 Correct 10 ms 2884 KB Output is correct
13 Correct 10 ms 3036 KB Output is correct
14 Correct 9 ms 3020 KB Output is correct
15 Correct 9 ms 3016 KB Output is correct
16 Correct 1473 ms 185124 KB Output is correct
17 Correct 1664 ms 196352 KB Output is correct
18 Correct 1487 ms 194488 KB Output is correct
19 Correct 1426 ms 193732 KB Output is correct
20 Correct 1465 ms 193876 KB Output is correct
21 Correct 1626 ms 193556 KB Output is correct
22 Correct 1320 ms 193536 KB Output is correct
23 Correct 1569 ms 196596 KB Output is correct
24 Correct 868 ms 194516 KB Output is correct
25 Correct 713 ms 193732 KB Output is correct
26 Correct 705 ms 193860 KB Output is correct
27 Correct 723 ms 193752 KB Output is correct
28 Correct 1767 ms 196292 KB Output is correct
29 Correct 1768 ms 196324 KB Output is correct
30 Correct 1720 ms 196336 KB Output is correct
31 Correct 1665 ms 196312 KB Output is correct
32 Correct 1354 ms 193828 KB Output is correct
33 Correct 1935 ms 194272 KB Output is correct
34 Correct 426 ms 27988 KB Output is correct
35 Correct 2225 ms 196596 KB Output is correct
36 Correct 1846 ms 194184 KB Output is correct
37 Correct 2217 ms 195912 KB Output is correct
38 Correct 1926 ms 194664 KB Output is correct
39 Correct 2064 ms 199388 KB Output is correct
40 Correct 1365 ms 202020 KB Output is correct
41 Correct 1420 ms 195456 KB Output is correct
42 Correct 856 ms 194340 KB Output is correct
43 Correct 2183 ms 200036 KB Output is correct
44 Correct 1919 ms 195852 KB Output is correct
45 Correct 1484 ms 199468 KB Output is correct
46 Correct 1947 ms 199188 KB Output is correct
47 Correct 1841 ms 196492 KB Output is correct
48 Correct 1856 ms 196304 KB Output is correct
49 Correct 1889 ms 196468 KB Output is correct
50 Correct 1909 ms 196392 KB Output is correct
51 Correct 1314 ms 202164 KB Output is correct
52 Correct 1357 ms 202212 KB Output is correct