oj.uz

Submission #876918

# Submission time Handle Problem Language Result Execution time Memory
876918 2023-11-22T13:38:54 Z Ivkosqn Jail (JOI22_jail) C++14
61 / 100
 5000 ms 250216 KB 
#include <bits/stdc++.h>
#define endl '\n'

using namespace std;

const int maxn = 120010;
int n, m, s[maxn], f[maxn], used[maxn], bef[maxn];
vector<int> v[maxn], g[maxn], paths[510];
int usedp[maxn];

void find_path(int ver){
    used[ver] = 1;
    for(int nb : v[ver]){
        if(used[nb])
            continue;
        bef[nb] = ver;
        find_path(nb);
    }
}

void read(){
    cin >> n;
    for(int i = 1;i <= n;i++){
        v[i].clear();
        g[i].clear();
    }
    for(int i = 1;i <= m;i++)
        paths[i].clear();
    for(int i = 1;i <= n - 1;i++){
        int x, y;
        cin >> x >> y;
        v[x].push_back(y);
        v[y].push_back(x);
    }
    cin >> m;
    for(int i = 1;i <= m;i++){
        cin >> s[i] >> f[i];
        for(int k = 1;k <= n;k++)
            used[k] = 0;
        find_path(s[i]);
        paths[i].push_back(f[i]);
        int x = f[i];
        while(x != s[i]){
            x = bef[x];
            paths[i].push_back(x);
        }
        sort(paths[i].begin(), paths[i].end());
    }
}

bool cycle = 0;

void DFS(int ver){
    used[ver] = 1;
    for(int nb : g[ver]){
        if(!used[nb])
            DFS(nb);
        else if(used[nb] == 1)
            cycle = 1;
    }
    used[ver] = 2;
}
void dfs(int ver){
    used[ver] = 1;
    for(int nb : v[ver]){
        if(used[nb])
            continue;
        dfs(nb);
    }
}

void solve(){
    read();
    for(int i = 1;i <= m;i++){
        for(int nb : paths[i])
            usedp[nb] = 1;
        for(int j = 1;j <= m;j++){
            if(i == j)
                continue;
            if(usedp[s[j]]){
                g[j].push_back(i);
                continue;
            }
            int ans = -1, l = 0, r = paths[j].size() - 1;
            while(l <= r){
                int mid = (l + r) / 2;
                if(paths[j][mid] <= f[i])
                    l = mid + 1, ans = mid;
                else
                    r = mid - 1;
            }
            if(ans != -1 && paths[j][ans] == f[i]){
                g[j].push_back(i);
            }
        }
        for(int nb : paths[i])
            usedp[nb] = 0;
    }
    cycle = 0;
    memset(used, 0, sizeof(used));
    for(int i = 1;i <= n;i++){
        if(!used[i]){
            DFS(i);
        }
    }
    if(cycle)
        cout << "No\n";
    else
        cout << "Yes\n";
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int t;
    cin >> t;
    while(t--){
        solve();
    }
    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 7004 KB Output is correct
2 Correct 2 ms 7004 KB Output is correct
3 Correct 1 ms 7004 KB Output is correct
4 Correct 11 ms 7108 KB Output is correct
5 Correct 23 ms 7112 KB Output is correct
6 Correct 3 ms 7004 KB Output is correct
7 Correct 2 ms 7004 KB Output is correct
8 Correct 11 ms 7260 KB Output is correct
9 Correct 641 ms 24400 KB Output is correct
10 Correct 1426 ms 250180 KB Output is correct
11 Correct 13 ms 7004 KB Output is correct
12 Correct 97 ms 7772 KB Output is correct
13 Execution timed out 5014 ms 17408 KB Time limit exceeded
14 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7000 KB Output is correct
2 Correct 1 ms 7004 KB Output is correct
3 Correct 2 ms 7004 KB Output is correct
4 Correct 2 ms 7000 KB Output is correct
5 Correct 2 ms 7008 KB Output is correct
6 Correct 3 ms 7004 KB Output is correct
7 Correct 2 ms 7096 KB Output is correct
8 Correct 2 ms 7004 KB Output is correct
9 Correct 2 ms 7004 KB Output is correct
10 Correct 2 ms 7004 KB Output is correct
11 Correct 2 ms 7116 KB Output is correct
12 Correct 2 ms 7108 KB Output is correct
13 Correct 2 ms 7000 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7000 KB Output is correct
2 Correct 1 ms 7004 KB Output is correct
3 Correct 2 ms 7004 KB Output is correct
4 Correct 2 ms 7000 KB Output is correct
5 Correct 2 ms 7008 KB Output is correct
6 Correct 3 ms 7004 KB Output is correct
7 Correct 2 ms 7096 KB Output is correct
8 Correct 2 ms 7004 KB Output is correct
9 Correct 2 ms 7004 KB Output is correct
10 Correct 2 ms 7004 KB Output is correct
11 Correct 2 ms 7116 KB Output is correct
12 Correct 2 ms 7108 KB Output is correct
13 Correct 2 ms 7000 KB Output is correct
14 Correct 2 ms 7004 KB Output is correct
15 Correct 1 ms 7004 KB Output is correct
16 Correct 3 ms 7004 KB Output is correct
17 Correct 2 ms 7004 KB Output is correct
18 Correct 2 ms 7004 KB Output is correct
19 Correct 2 ms 7000 KB Output is correct
20 Correct 3 ms 7004 KB Output is correct
21 Correct 3 ms 7004 KB Output is correct
22 Correct 2 ms 7004 KB Output is correct
23 Correct 2 ms 7004 KB Output is correct
24 Correct 2 ms 7004 KB Output is correct
25 Correct 3 ms 7100 KB Output is correct
26 Correct 2 ms 7004 KB Output is correct
27 Correct 3 ms 6884 KB Output is correct
28 Correct 2 ms 7004 KB Output is correct

Subtask #4
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7000 KB Output is correct
2 Correct 1 ms 7004 KB Output is correct
3 Correct 2 ms 7004 KB Output is correct
4 Correct 2 ms 7000 KB Output is correct
5 Correct 2 ms 7008 KB Output is correct
6 Correct 3 ms 7004 KB Output is correct
7 Correct 2 ms 7096 KB Output is correct
8 Correct 2 ms 7004 KB Output is correct
9 Correct 2 ms 7004 KB Output is correct
10 Correct 2 ms 7004 KB Output is correct
11 Correct 2 ms 7116 KB Output is correct
12 Correct 2 ms 7108 KB Output is correct
13 Correct 2 ms 7000 KB Output is correct
14 Correct 2 ms 7004 KB Output is correct
15 Correct 1 ms 7004 KB Output is correct
16 Correct 3 ms 7004 KB Output is correct
17 Correct 2 ms 7004 KB Output is correct
18 Correct 2 ms 7004 KB Output is correct
19 Correct 2 ms 7000 KB Output is correct
20 Correct 3 ms 7004 KB Output is correct
21 Correct 3 ms 7004 KB Output is correct
22 Correct 2 ms 7004 KB Output is correct
23 Correct 2 ms 7004 KB Output is correct
24 Correct 2 ms 7004 KB Output is correct
25 Correct 3 ms 7100 KB Output is correct
26 Correct 2 ms 7004 KB Output is correct
27 Correct 3 ms 6884 KB Output is correct
28 Correct 2 ms 7004 KB Output is correct
29 Correct 8 ms 7260 KB Output is correct
30 Correct 6 ms 7080 KB Output is correct
31 Correct 9 ms 7004 KB Output is correct
32 Correct 6 ms 7004 KB Output is correct
33 Correct 3 ms 7108 KB Output is correct
34 Correct 7 ms 7004 KB Output is correct
35 Correct 9 ms 7004 KB Output is correct
36 Correct 7 ms 7108 KB Output is correct
37 Correct 6 ms 7004 KB Output is correct

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7000 KB Output is correct
2 Correct 1 ms 7004 KB Output is correct
3 Correct 2 ms 7004 KB Output is correct
4 Correct 2 ms 7000 KB Output is correct
5 Correct 2 ms 7008 KB Output is correct
6 Correct 3 ms 7004 KB Output is correct
7 Correct 2 ms 7096 KB Output is correct
8 Correct 2 ms 7004 KB Output is correct
9 Correct 2 ms 7004 KB Output is correct
10 Correct 2 ms 7004 KB Output is correct
11 Correct 2 ms 7116 KB Output is correct
12 Correct 2 ms 7108 KB Output is correct
13 Correct 2 ms 7000 KB Output is correct
14 Correct 2 ms 7004 KB Output is correct
15 Correct 1 ms 7004 KB Output is correct
16 Correct 3 ms 7004 KB Output is correct
17 Correct 2 ms 7004 KB Output is correct
18 Correct 2 ms 7004 KB Output is correct
19 Correct 2 ms 7000 KB Output is correct
20 Correct 3 ms 7004 KB Output is correct
21 Correct 3 ms 7004 KB Output is correct
22 Correct 2 ms 7004 KB Output is correct
23 Correct 2 ms 7004 KB Output is correct
24 Correct 2 ms 7004 KB Output is correct
25 Correct 3 ms 7100 KB Output is correct
26 Correct 2 ms 7004 KB Output is correct
27 Correct 3 ms 6884 KB Output is correct
28 Correct 2 ms 7004 KB Output is correct
29 Correct 8 ms 7260 KB Output is correct
30 Correct 6 ms 7080 KB Output is correct
31 Correct 9 ms 7004 KB Output is correct
32 Correct 6 ms 7004 KB Output is correct
33 Correct 3 ms 7108 KB Output is correct
34 Correct 7 ms 7004 KB Output is correct
35 Correct 9 ms 7004 KB Output is correct
36 Correct 7 ms 7108 KB Output is correct
37 Correct 6 ms 7004 KB Output is correct
38 Correct 637 ms 24236 KB Output is correct
39 Correct 1403 ms 250216 KB Output is correct
40 Correct 986 ms 13996 KB Output is correct
41 Correct 852 ms 8272 KB Output is correct
42 Correct 422 ms 15956 KB Output is correct
43 Correct 83 ms 8020 KB Output is correct
44 Correct 104 ms 7508 KB Output is correct
45 Correct 1712 ms 12888 KB Output is correct
46 Correct 1626 ms 12716 KB Output is correct
47 Correct 851 ms 54672 KB Output is correct
48 Correct 854 ms 56712 KB Output is correct
49 Correct 1102 ms 14960 KB Output is correct
50 Correct 1159 ms 15260 KB Output is correct
51 Correct 387 ms 12628 KB Output is correct
52 Correct 392 ms 12628 KB Output is correct
53 Correct 95 ms 7760 KB Output is correct
54 Correct 1409 ms 12196 KB Output is correct

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7000 KB Output is correct
2 Correct 2 ms 7000 KB Output is correct
3 Correct 1 ms 7004 KB Output is correct
4 Correct 2 ms 7000 KB Output is correct
5 Correct 13 ms 7004 KB Output is correct
6 Correct 2 ms 7004 KB Output is correct
7 Correct 2 ms 7004 KB Output is correct
8 Correct 2 ms 7004 KB Output is correct
9 Correct 2 ms 7004 KB Output is correct
10 Correct 2 ms 7004 KB Output is correct
11 Correct 2 ms 7004 KB Output is correct
12 Correct 6 ms 7004 KB Output is correct
13 Correct 65 ms 7156 KB Output is correct
14 Correct 62 ms 7004 KB Output is correct
15 Correct 60 ms 7004 KB Output is correct
16 Execution timed out 5048 ms 11672 KB Time limit exceeded
17 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 7004 KB Output is correct
2 Correct 2 ms 7004 KB Output is correct
3 Correct 1 ms 7004 KB Output is correct
4 Correct 11 ms 7108 KB Output is correct
5 Correct 23 ms 7112 KB Output is correct
6 Correct 3 ms 7004 KB Output is correct
7 Correct 2 ms 7004 KB Output is correct
8 Correct 11 ms 7260 KB Output is correct
9 Correct 641 ms 24400 KB Output is correct
10 Correct 1426 ms 250180 KB Output is correct
11 Correct 13 ms 7004 KB Output is correct
12 Correct 97 ms 7772 KB Output is correct
13 Execution timed out 5014 ms 17408 KB Time limit exceeded
14 Halted 0 ms 0 KB -