oj.uz

답안 #624217

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
624217 2022-08-07T13:27:31 Z boris_mihov Jail (JOI22_jail) C++14
72 / 100
 5000 ms 586544 KB 
#include <algorithm>
#include <iostream>
#include <numeric>
#include <vector>

typedef long long llong;
const int MAXN = 300000 + 10;
const int INF  = 2e9;

int n, q;
int parent[MAXN];
int in[MAXN], out[MAXN], timer;
int begin[MAXN], end[MAXN];
std::vector <int> g[MAXN];
std::vector <int> v[MAXN];
int from[MAXN], to[MAXN];

void initDFS(int node, int p)
{
    parent[node] = p;
    in[node] = ++timer;
    for (const int &i : g[node])
    {
        if (i == p) continue;
        initDFS(i, node);
    }

    out[node] = ++timer;
}

inline bool inSubtree(int x, int y)
{
    return in[y] <= in[x] && out[x] <= out[y];
}

void cyclePath(int start, int finish, int num)
{
    if (inSubtree(start, finish))
    {
        if (begin[start] != 0 && begin[start] != num)
        {
            v[num].push_back(begin[start]);
        }

        if (end[start] != 0 && end[start] != num)
        {
            v[end[start]].push_back(num);
        }

        if (start != finish) cyclePath(parent[start], finish, num);
    } else
    {
        if (begin[finish] != 0 && begin[finish] != num)
        {
            v[num].push_back(begin[finish]);
        }

        if (end[finish] != 0 && end[finish] != num)
        {
            v[end[finish]].push_back(num);
        }

        cyclePath(start, parent[finish], num);
    }
}

int vis[MAXN];
bool findCycle(int node)
{
    vis[node] = 1;
    for (const int &i : v[node])
    {
        if (vis[i] == 2) continue;
        if (vis[i] == 1) return true;
        if (findCycle(i)) return true;
    }

    vis[node] = 2;
    return false;
}

void solve()
{
    initDFS(1, 0);
    for (int i = 1 ; i <= q ; ++i)
    {
        if (from[i] == to[i]) continue;
        cyclePath(from[i], to[i], i);
    }

    for (int i = 1 ; i <= q ; ++i)
    {
        if (vis[i] == 2) continue;
        if (findCycle(i))
        {
            std::cout << "No\n";
            return;
        }
    }

    std::cout << "Yes\n";
}

void read()
{
    int x, y;
    std::cin >> n;
    for (int i = 2 ; i <= n ; ++i)
    {
        std::cin >> x >> y;
        g[x].push_back(y);
        g[y].push_back(x);
    }

    std::cin >> q;
    for (int i = 1 ; i <= q ; ++i)
    {
        std::cin >> from[i] >> to[i];
        begin[from[i]] = i;
        end[to[i]] = i;
    }
}

void reset()
{
    for (int i = 1 ; i <= std::max(n, q) ; ++i)
    {
        g[i].clear();
        v[i].clear();
        begin[i] = 0;
        end[i] = 0;
        vis[i] = 0;
        timer = 0;
    }
}

void fastIO()
{
    std::ios_base :: sync_with_stdio(0);
    std::cout.tie(nullptr);
    std::cin.tie(nullptr);
}

int tests;
int main()
{
    fastIO();
    std::cin >> tests;

    while (tests--)
    {
        reset();
        read();
        solve();
    }

    return 0;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 7 ms 14416 KB Output is correct
3 Correct 8 ms 14428 KB Output is correct
4 Correct 14 ms 14704 KB Output is correct
5 Correct 22 ms 15188 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 8 ms 14440 KB Output is correct
8 Correct 9 ms 14576 KB Output is correct
9 Correct 97 ms 18204 KB Output is correct
10 Correct 587 ms 29848 KB Output is correct
11 Correct 11 ms 14548 KB Output is correct
12 Correct 37 ms 15520 KB Output is correct
13 Correct 139 ms 58528 KB Output is correct
14 Correct 170 ms 73396 KB Output is correct
15 Execution timed out 5034 ms 586544 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 10 ms 14420 KB Output is correct
3 Correct 9 ms 14420 KB Output is correct
4 Correct 9 ms 14444 KB Output is correct
5 Correct 9 ms 14548 KB Output is correct
6 Correct 11 ms 14420 KB Output is correct
7 Correct 11 ms 14492 KB Output is correct
8 Correct 8 ms 14444 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 9 ms 14516 KB Output is correct
11 Correct 8 ms 14416 KB Output is correct
12 Correct 7 ms 14440 KB Output is correct
13 Correct 8 ms 14448 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 10 ms 14420 KB Output is correct
3 Correct 9 ms 14420 KB Output is correct
4 Correct 9 ms 14444 KB Output is correct
5 Correct 9 ms 14548 KB Output is correct
6 Correct 11 ms 14420 KB Output is correct
7 Correct 11 ms 14492 KB Output is correct
8 Correct 8 ms 14444 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 9 ms 14516 KB Output is correct
11 Correct 8 ms 14416 KB Output is correct
12 Correct 7 ms 14440 KB Output is correct
13 Correct 8 ms 14448 KB Output is correct
14 Correct 8 ms 14556 KB Output is correct
15 Correct 8 ms 14388 KB Output is correct
16 Correct 8 ms 14424 KB Output is correct
17 Correct 9 ms 14448 KB Output is correct
18 Correct 9 ms 14420 KB Output is correct
19 Correct 8 ms 14432 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 8 ms 14444 KB Output is correct
22 Correct 8 ms 14440 KB Output is correct
23 Correct 8 ms 14460 KB Output is correct
24 Correct 10 ms 14472 KB Output is correct
25 Correct 8 ms 14420 KB Output is correct
26 Correct 8 ms 14420 KB Output is correct
27 Correct 9 ms 14420 KB Output is correct
28 Correct 8 ms 14420 KB Output is correct

Subtask #4
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 10 ms 14420 KB Output is correct
3 Correct 9 ms 14420 KB Output is correct
4 Correct 9 ms 14444 KB Output is correct
5 Correct 9 ms 14548 KB Output is correct
6 Correct 11 ms 14420 KB Output is correct
7 Correct 11 ms 14492 KB Output is correct
8 Correct 8 ms 14444 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 9 ms 14516 KB Output is correct
11 Correct 8 ms 14416 KB Output is correct
12 Correct 7 ms 14440 KB Output is correct
13 Correct 8 ms 14448 KB Output is correct
14 Correct 8 ms 14556 KB Output is correct
15 Correct 8 ms 14388 KB Output is correct
16 Correct 8 ms 14424 KB Output is correct
17 Correct 9 ms 14448 KB Output is correct
18 Correct 9 ms 14420 KB Output is correct
19 Correct 8 ms 14432 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 8 ms 14444 KB Output is correct
22 Correct 8 ms 14440 KB Output is correct
23 Correct 8 ms 14460 KB Output is correct
24 Correct 10 ms 14472 KB Output is correct
25 Correct 8 ms 14420 KB Output is correct
26 Correct 8 ms 14420 KB Output is correct
27 Correct 9 ms 14420 KB Output is correct
28 Correct 8 ms 14420 KB Output is correct
29 Correct 10 ms 14548 KB Output is correct
30 Correct 9 ms 14444 KB Output is correct
31 Correct 9 ms 14548 KB Output is correct
32 Correct 9 ms 14420 KB Output is correct
33 Correct 9 ms 14440 KB Output is correct
34 Correct 9 ms 14444 KB Output is correct
35 Correct 10 ms 14548 KB Output is correct
36 Correct 10 ms 14444 KB Output is correct
37 Correct 8 ms 14420 KB Output is correct

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 10 ms 14420 KB Output is correct
3 Correct 9 ms 14420 KB Output is correct
4 Correct 9 ms 14444 KB Output is correct
5 Correct 9 ms 14548 KB Output is correct
6 Correct 11 ms 14420 KB Output is correct
7 Correct 11 ms 14492 KB Output is correct
8 Correct 8 ms 14444 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 9 ms 14516 KB Output is correct
11 Correct 8 ms 14416 KB Output is correct
12 Correct 7 ms 14440 KB Output is correct
13 Correct 8 ms 14448 KB Output is correct
14 Correct 8 ms 14556 KB Output is correct
15 Correct 8 ms 14388 KB Output is correct
16 Correct 8 ms 14424 KB Output is correct
17 Correct 9 ms 14448 KB Output is correct
18 Correct 9 ms 14420 KB Output is correct
19 Correct 8 ms 14432 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 8 ms 14444 KB Output is correct
22 Correct 8 ms 14440 KB Output is correct
23 Correct 8 ms 14460 KB Output is correct
24 Correct 10 ms 14472 KB Output is correct
25 Correct 8 ms 14420 KB Output is correct
26 Correct 8 ms 14420 KB Output is correct
27 Correct 9 ms 14420 KB Output is correct
28 Correct 8 ms 14420 KB Output is correct
29 Correct 10 ms 14548 KB Output is correct
30 Correct 9 ms 14444 KB Output is correct
31 Correct 9 ms 14548 KB Output is correct
32 Correct 9 ms 14420 KB Output is correct
33 Correct 9 ms 14440 KB Output is correct
34 Correct 9 ms 14444 KB Output is correct
35 Correct 10 ms 14548 KB Output is correct
36 Correct 10 ms 14444 KB Output is correct
37 Correct 8 ms 14420 KB Output is correct
38 Correct 102 ms 18400 KB Output is correct
39 Correct 573 ms 29792 KB Output is correct
40 Correct 59 ms 17228 KB Output is correct
41 Correct 30 ms 15988 KB Output is correct
42 Correct 49 ms 17240 KB Output is correct
43 Correct 26 ms 16012 KB Output is correct
44 Correct 14 ms 14932 KB Output is correct
45 Correct 50 ms 22012 KB Output is correct
46 Correct 47 ms 21920 KB Output is correct
47 Correct 88 ms 25556 KB Output is correct
48 Correct 89 ms 25572 KB Output is correct
49 Correct 55 ms 22168 KB Output is correct
50 Correct 52 ms 22092 KB Output is correct
51 Correct 39 ms 22744 KB Output is correct
52 Correct 44 ms 22804 KB Output is correct
53 Correct 16 ms 15224 KB Output is correct
54 Correct 55 ms 21896 KB Output is correct

Subtask #6
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14432 KB Output is correct
2 Correct 7 ms 14432 KB Output is correct
3 Correct 8 ms 14432 KB Output is correct
4 Correct 8 ms 14432 KB Output is correct
5 Correct 12 ms 14584 KB Output is correct
6 Correct 8 ms 14432 KB Output is correct
7 Correct 8 ms 14420 KB Output is correct
8 Correct 8 ms 14452 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 9 ms 14432 KB Output is correct
11 Correct 8 ms 14432 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 21 ms 14972 KB Output is correct
14 Correct 28 ms 15336 KB Output is correct
15 Correct 26 ms 15180 KB Output is correct
16 Correct 51 ms 22584 KB Output is correct
17 Correct 107 ms 28680 KB Output is correct
18 Correct 249 ms 49076 KB Output is correct
19 Correct 56 ms 22776 KB Output is correct
20 Correct 63 ms 22776 KB Output is correct
21 Correct 57 ms 22756 KB Output is correct
22 Correct 91 ms 28872 KB Output is correct
23 Correct 80 ms 28996 KB Output is correct
24 Correct 81 ms 29004 KB Output is correct
25 Correct 81 ms 29148 KB Output is correct
26 Correct 83 ms 29252 KB Output is correct
27 Correct 98 ms 32996 KB Output is correct
28 Correct 101 ms 34552 KB Output is correct
29 Correct 92 ms 31620 KB Output is correct
30 Correct 79 ms 27784 KB Output is correct
31 Correct 72 ms 28276 KB Output is correct
32 Correct 69 ms 27592 KB Output is correct
33 Correct 71 ms 28244 KB Output is correct

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 7 ms 14416 KB Output is correct
3 Correct 8 ms 14428 KB Output is correct
4 Correct 14 ms 14704 KB Output is correct
5 Correct 22 ms 15188 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 8 ms 14440 KB Output is correct
8 Correct 9 ms 14576 KB Output is correct
9 Correct 97 ms 18204 KB Output is correct
10 Correct 587 ms 29848 KB Output is correct
11 Correct 11 ms 14548 KB Output is correct
12 Correct 37 ms 15520 KB Output is correct
13 Correct 139 ms 58528 KB Output is correct
14 Correct 170 ms 73396 KB Output is correct
15 Execution timed out 5034 ms 586544 KB Time limit exceeded
16 Halted 0 ms 0 KB -