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Submission #917024

# Submission time Handle Problem Language Result Execution time Memory
917024 2024-01-27T02:04:23 Z 12345678 Highway Tolls (IOI18_highway) C++17
100 / 100
 210 ms 16072 KB 
#include "highway.h"
#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=1e5+5;
ll m, res, l, r, ls, rs, vs[nx], cnt, nl, nr;
pair<int, int> id[nx], ans;
vector<int> qrs, used;
vector<pair<int, int>> d[nx], t[nx];
queue<int> q;

void dfs(int u)
{
    for (auto [v, idx]:t[u]) id[++cnt]={v, idx}, dfs(v);
}

void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
    m=U.size();
    qrs.resize(U.size());
    for (int i=0; i<m; i++) qrs[i]=0, d[U[i]].push_back({V[i], i}), d[V[i]].push_back({U[i], i});
    res=ask(qrs);
    l=0; r=m-1;
    while (l<r)
    {
        int md=(l+r)/2;
        for (int i=0; i<m; i++) qrs[i]=i>md;
        if (ask(qrs)!=res) l=md+1;
        else r=md; 
    }
    ls=U[l];
    rs=V[l];
    //cout<<"edge "<<ls<<' '<<rs<<'\n';
    vs[ls]=vs[rs]=1;
    used.push_back(l);
    q.push(ls);
    q.push(rs);
    while (!q.empty())
    {
        auto u=q.front();
        q.pop();
        for (auto [v, idx]:d[u]) if (!vs[v]) t[u].push_back({v, idx}), used.push_back(idx), vs[v]=1, q.push(v);
    }
    //cout<<"edge "<<ls<<' '<<rs<<'\n';
    //for (int i=0; i<m; i++) cout<<used[i]<<' ';
    //cout<<'\n';
    id[0]={ls, l};
    dfs(ls);
    nl=0; nr=cnt;
    for (int i=0; i<m; i++) qrs[i]=1;
    while (nl<nr)
    {
        int md=(nl+nr+1)/2;
        for (auto x:used) qrs[x]=0;
        for (int i=md; i<=nr; i++) qrs[id[i].second]=1;
        if (ask(qrs)!=res) nl=md;
        else nr=md-1;
    }
    ans.first=id[nl].first;
    id[0]={rs, l};
    cnt=0;
    dfs(rs);
    nl=0; nr=cnt;
    while (nl<nr)
    {
        int md=(nl+nr+1)/2;
        for (auto x:used) qrs[x]=0;
        for (int i=md; i<=nr; i++) qrs[id[i].second]=1;
        if (ask(qrs)!=res) nl=md;
        else nr=md-1;
    }
    ans.second=id[nl].first;
    answer(ans.first, ans.second);
}

/*
3 3 1 2 0 1
0 1
1 2
2 0

4 4 1 3 1 3
0 1
0 2
0 3
1 2

3 6 1 2 1 2
0 1
0 1
1 2
1 2
2 0
2 0
*/

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5152 KB Output is correct
2 Correct 2 ms 5152 KB Output is correct
3 Correct 2 ms 5156 KB Output is correct
4 Correct 1 ms 5148 KB Output is correct
5 Correct 2 ms 5144 KB Output is correct
6 Correct 2 ms 5148 KB Output is correct
7 Correct 2 ms 5152 KB Output is correct
8 Correct 2 ms 5148 KB Output is correct
9 Correct 1 ms 5148 KB Output is correct
10 Correct 2 ms 5152 KB Output is correct
11 Correct 2 ms 5152 KB Output is correct
12 Correct 2 ms 5148 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5200 KB Output is correct
2 Correct 11 ms 6116 KB Output is correct
3 Correct 99 ms 13712 KB Output is correct
4 Correct 95 ms 13908 KB Output is correct
5 Correct 84 ms 13728 KB Output is correct
6 Correct 86 ms 13952 KB Output is correct
7 Correct 88 ms 13764 KB Output is correct
8 Correct 108 ms 13872 KB Output is correct
9 Correct 88 ms 13816 KB Output is correct
10 Correct 87 ms 13728 KB Output is correct
11 Correct 108 ms 14816 KB Output is correct
12 Correct 102 ms 14660 KB Output is correct
13 Correct 105 ms 14912 KB Output is correct
14 Correct 155 ms 14940 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 6128 KB Output is correct
2 Correct 17 ms 7192 KB Output is correct
3 Correct 26 ms 8560 KB Output is correct
4 Correct 109 ms 14880 KB Output is correct
5 Correct 73 ms 15032 KB Output is correct
6 Correct 79 ms 15492 KB Output is correct
7 Correct 86 ms 15748 KB Output is correct
8 Correct 73 ms 15080 KB Output is correct
9 Correct 68 ms 15528 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5204 KB Output is correct
2 Correct 14 ms 5964 KB Output is correct
3 Correct 71 ms 11844 KB Output is correct
4 Correct 110 ms 13944 KB Output is correct
5 Correct 105 ms 13716 KB Output is correct
6 Correct 146 ms 13988 KB Output is correct
7 Correct 85 ms 13956 KB Output is correct
8 Correct 91 ms 13720 KB Output is correct
9 Correct 99 ms 13488 KB Output is correct
10 Correct 111 ms 13720 KB Output is correct
11 Correct 103 ms 14592 KB Output is correct
12 Correct 108 ms 14884 KB Output is correct
13 Correct 147 ms 14736 KB Output is correct
14 Correct 109 ms 14520 KB Output is correct
15 Correct 80 ms 13748 KB Output is correct
16 Correct 86 ms 13768 KB Output is correct
17 Correct 95 ms 14864 KB Output is correct
18 Correct 111 ms 14680 KB Output is correct
19 Correct 83 ms 13724 KB Output is correct
20 Correct 97 ms 14836 KB Output is correct
21 Correct 74 ms 14436 KB Output is correct
22 Correct 79 ms 14440 KB Output is correct
23 Correct 75 ms 13496 KB Output is correct
24 Correct 84 ms 13172 KB Output is correct
25 Correct 108 ms 15508 KB Output is correct

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 6248 KB Output is correct
2 Correct 11 ms 6180 KB Output is correct
3 Correct 103 ms 13940 KB Output is correct
4 Correct 103 ms 14684 KB Output is correct
5 Correct 148 ms 15364 KB Output is correct
6 Correct 134 ms 15860 KB Output is correct
7 Correct 172 ms 15540 KB Output is correct
8 Correct 155 ms 15692 KB Output is correct
9 Correct 101 ms 11800 KB Output is correct
10 Correct 101 ms 12596 KB Output is correct
11 Correct 95 ms 13028 KB Output is correct
12 Correct 128 ms 14572 KB Output is correct
13 Correct 118 ms 15020 KB Output is correct
14 Correct 141 ms 15516 KB Output is correct
15 Correct 135 ms 15880 KB Output is correct
16 Correct 148 ms 13008 KB Output is correct
17 Correct 82 ms 13712 KB Output is correct
18 Correct 62 ms 13640 KB Output is correct
19 Correct 84 ms 13708 KB Output is correct
20 Correct 85 ms 13736 KB Output is correct
21 Correct 137 ms 15800 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 6248 KB Output is correct
2 Correct 13 ms 6160 KB Output is correct
3 Correct 107 ms 14568 KB Output is correct
4 Correct 109 ms 14260 KB Output is correct
5 Correct 143 ms 15156 KB Output is correct
6 Correct 138 ms 15376 KB Output is correct
7 Correct 105 ms 14004 KB Output is correct
8 Correct 110 ms 14244 KB Output is correct
9 Correct 112 ms 14760 KB Output is correct
10 Correct 174 ms 15600 KB Output is correct
11 Correct 159 ms 15648 KB Output is correct
12 Correct 156 ms 15360 KB Output is correct
13 Correct 135 ms 13396 KB Output is correct
14 Correct 89 ms 13052 KB Output is correct
15 Correct 125 ms 13252 KB Output is correct
16 Correct 99 ms 12856 KB Output is correct
17 Correct 101 ms 13240 KB Output is correct
18 Correct 90 ms 12636 KB Output is correct
19 Correct 143 ms 14708 KB Output is correct
20 Correct 137 ms 15076 KB Output is correct
21 Correct 150 ms 15880 KB Output is correct
22 Correct 137 ms 15540 KB Output is correct
23 Correct 164 ms 15728 KB Output is correct
24 Correct 148 ms 15476 KB Output is correct
25 Correct 182 ms 15728 KB Output is correct
26 Correct 144 ms 16072 KB Output is correct
27 Correct 111 ms 13640 KB Output is correct
28 Correct 76 ms 13436 KB Output is correct
29 Correct 81 ms 13996 KB Output is correct
30 Correct 81 ms 13868 KB Output is correct
31 Correct 87 ms 13592 KB Output is correct
32 Correct 76 ms 13404 KB Output is correct
33 Correct 81 ms 13864 KB Output is correct
34 Correct 82 ms 13892 KB Output is correct
35 Correct 75 ms 13804 KB Output is correct
36 Correct 84 ms 13340 KB Output is correct
37 Correct 86 ms 13816 KB Output is correct
38 Correct 73 ms 13860 KB Output is correct
39 Correct 166 ms 15844 KB Output is correct
40 Correct 178 ms 15668 KB Output is correct
41 Correct 210 ms 15936 KB Output is correct
42 Correct 151 ms 15416 KB Output is correct