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Submission #477644

# Submission time Handle Problem Language Result Execution time Memory
477644 2021-10-02T23:44:16 Z SirCovidThe19th Werewolf (IOI18_werewolf) C++17
100 / 100
 3878 ms 352436 KB 
#include <bits/stdc++.h>
#include "werewolf.h"
using namespace std; 

#define vi vector<int>

const int mx = 6e5 + 5;

struct dsuTree{
    int par[mx], tin[mx], tout[mx], ti, id; vector<int> adj[mx];
    dsuTree(int n){ 
        iota(par, par + n * 2, 0); id = n; 
    }
    int get(int i){ 
        return i == par[i] ? i : par[i] = get(par[i]); 
    }
    void merge(int a, int b){
        a = get(a); b = get(b); if (a == b) return;
        adj[id].push_back(a); adj[id].push_back(b);
        par[a] = par[b] = id++;
    }
    void dfs(int i){
        tin[i] = ti++;
        for (int x : adj[i]) dfs(x);
        tout[i] = ti - 1;
    }
};
struct segTree{
    multiset<int> seg[mx * 2]; 
    void upd(int i, int num){
        for (i += mx; i; i /= 2) seg[i].insert(num);
    }
    bool qry(int l, int r, int a, int b){
        bool ans = 0;
        auto chk = [&](int i){ 
            auto it = seg[i].lower_bound(a);
            return it != seg[i].end() and *it <= b;
        };
        for (l += mx, r += mx; l <= r and !ans; r /= 2, l /= 2){
            if (l % 2 == 1) ans |= chk(l++);
            if (r % 2 == 0) ans |= chk(r--);
        }
        return ans;
    }
};
vi check_validity(int n, vi X, vi Y, vi S, vi E, vi L, vi R){
    int m = X.size(), q = L.size(); vi adj[n], QL[n], QR[n];
    
    for (int i = 0; i < m; i++) adj[X[i]].push_back(Y[i]), adj[Y[i]].push_back(X[i]);
    for (int i = 0; i < q; i++) QL[L[i]].push_back(i), QR[R[i]].push_back(i);

    dsuTree TL(n), TR(n); vi st1(q), st2(q), ans(q);

    for (int i = n - 1; ~i; i--){
        for (int x : adj[i]) if (x > i) TL.merge(i, x); 
        for (int qry : QL[i]) st1[qry] = TL.get(S[qry]);
    }
    for (int i = 0; i < n; i++){
        for (int x : adj[i]) if (x < i) TR.merge(i, x);
        for (int qry : QR[i]) st2[qry] = TR.get(E[qry]);
    }
    TL.dfs(TL.id - 1); TR.dfs(TR.id - 1); segTree seg;

    for (int i = 0; i < n; i++) 
        seg.upd(TL.tin[i], TR.tin[i]);
    for (int i = 0; i < q; i++)
        ans[i] = seg.qry(TL.tin[st1[i]], TL.tout[st1[i]], TR.tin[st2[i]], TR.tout[st2[i]]);
    
    return ans;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 99016 KB Output is correct
2 Correct 59 ms 98912 KB Output is correct
3 Correct 61 ms 98932 KB Output is correct
4 Correct 59 ms 98872 KB Output is correct
5 Correct 63 ms 99012 KB Output is correct
6 Correct 61 ms 98924 KB Output is correct
7 Correct 60 ms 98924 KB Output is correct
8 Correct 61 ms 99012 KB Output is correct
9 Correct 59 ms 99012 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 99016 KB Output is correct
2 Correct 59 ms 98912 KB Output is correct
3 Correct 61 ms 98932 KB Output is correct
4 Correct 59 ms 98872 KB Output is correct
5 Correct 63 ms 99012 KB Output is correct
6 Correct 61 ms 98924 KB Output is correct
7 Correct 60 ms 98924 KB Output is correct
8 Correct 61 ms 99012 KB Output is correct
9 Correct 59 ms 99012 KB Output is correct
10 Correct 76 ms 102596 KB Output is correct
11 Correct 86 ms 102608 KB Output is correct
12 Correct 79 ms 102468 KB Output is correct
13 Correct 82 ms 102560 KB Output is correct
14 Correct 79 ms 102692 KB Output is correct
15 Correct 82 ms 102596 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 3175 ms 337664 KB Output is correct
2 Correct 2085 ms 340352 KB Output is correct
3 Correct 2019 ms 338624 KB Output is correct
4 Correct 2249 ms 337892 KB Output is correct
5 Correct 2301 ms 337772 KB Output is correct
6 Correct 2868 ms 337716 KB Output is correct
7 Correct 3121 ms 335312 KB Output is correct
8 Correct 1903 ms 340316 KB Output is correct
9 Correct 1872 ms 337480 KB Output is correct
10 Correct 2287 ms 336640 KB Output is correct
11 Correct 2376 ms 336716 KB Output is correct
12 Correct 2658 ms 337332 KB Output is correct
13 Correct 2114 ms 340252 KB Output is correct
14 Correct 2118 ms 340168 KB Output is correct
15 Correct 2005 ms 340152 KB Output is correct
16 Correct 2143 ms 340308 KB Output is correct
17 Correct 3049 ms 335428 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 99016 KB Output is correct
2 Correct 59 ms 98912 KB Output is correct
3 Correct 61 ms 98932 KB Output is correct
4 Correct 59 ms 98872 KB Output is correct
5 Correct 63 ms 99012 KB Output is correct
6 Correct 61 ms 98924 KB Output is correct
7 Correct 60 ms 98924 KB Output is correct
8 Correct 61 ms 99012 KB Output is correct
9 Correct 59 ms 99012 KB Output is correct
10 Correct 76 ms 102596 KB Output is correct
11 Correct 86 ms 102608 KB Output is correct
12 Correct 79 ms 102468 KB Output is correct
13 Correct 82 ms 102560 KB Output is correct
14 Correct 79 ms 102692 KB Output is correct
15 Correct 82 ms 102596 KB Output is correct
16 Correct 3175 ms 337664 KB Output is correct
17 Correct 2085 ms 340352 KB Output is correct
18 Correct 2019 ms 338624 KB Output is correct
19 Correct 2249 ms 337892 KB Output is correct
20 Correct 2301 ms 337772 KB Output is correct
21 Correct 2868 ms 337716 KB Output is correct
22 Correct 3121 ms 335312 KB Output is correct
23 Correct 1903 ms 340316 KB Output is correct
24 Correct 1872 ms 337480 KB Output is correct
25 Correct 2287 ms 336640 KB Output is correct
26 Correct 2376 ms 336716 KB Output is correct
27 Correct 2658 ms 337332 KB Output is correct
28 Correct 2114 ms 340252 KB Output is correct
29 Correct 2118 ms 340168 KB Output is correct
30 Correct 2005 ms 340152 KB Output is correct
31 Correct 2143 ms 340308 KB Output is correct
32 Correct 3049 ms 335428 KB Output is correct
33 Correct 3818 ms 338656 KB Output is correct
34 Correct 333 ms 135112 KB Output is correct
35 Correct 3658 ms 349148 KB Output is correct
36 Correct 3796 ms 346644 KB Output is correct
37 Correct 3836 ms 348588 KB Output is correct
38 Correct 3878 ms 347052 KB Output is correct
39 Correct 3451 ms 351608 KB Output is correct
40 Correct 2900 ms 352436 KB Output is correct
41 Correct 3660 ms 348016 KB Output is correct
42 Correct 3242 ms 345360 KB Output is correct
43 Correct 2988 ms 352160 KB Output is correct
44 Correct 3663 ms 348584 KB Output is correct
45 Correct 3315 ms 350752 KB Output is correct
46 Correct 3330 ms 350536 KB Output is correct
47 Correct 2017 ms 348816 KB Output is correct
48 Correct 2050 ms 348680 KB Output is correct
49 Correct 2056 ms 348840 KB Output is correct
50 Correct 2087 ms 348832 KB Output is correct
51 Correct 2970 ms 351260 KB Output is correct
52 Correct 2913 ms 351176 KB Output is correct