oj.uz

Submission #706541

# Submission time Handle Problem Language Result Execution time Memory
706541 2023-03-07T01:50:29 Z pcc Jail (JOI22_jail) C++14
21 / 100
 21 ms 476 KB 
#include <bits/stdc++.h>
using namespace std;

const int mxn =255;
int pre[mxn];
vector<int> tree[mxn];
vector<int> dir[mxn];
bitset<mxn> used;
int m;
int n;

void dfs(int now,int par){
    pre[now] = par;
    for(auto nxt:tree[now]){
        if(nxt == par)continue;
        dfs(nxt,now);
    }
    return;
}
bool f(int arr[]){
    bitset<mxn> tmp;
    for(int i = 1;i<=n;i++)tmp[i] = used[i];
    bool flag = true;
    // for(int i = 0;i<m;i++)cout<<arr[i]<<',';cout<<endl;
    for(int i = 0;i<m;i++){
        int now = arr[i];
        for(auto &j:dir[now])if(j != dir[now].back()&&tmp[j])flag = false;
        tmp[dir[now].back()] = false;
        tmp[dir[now][0]] = true;
        // for(int j = 1;j<=n;j++)cout<<tmp[j];cout<<endl;
    }
    if(flag)return true;
    else return false;
}
void solve(){
    cin>>n;
    if(n>mxn)exit(0);
    for(int i = 0;i<n-1;i++){
        int a,b;
        cin>>a>>b;
        tree[a].push_back(b);
        tree[b].push_back(a);
    }
    cin>>m;
    if(m>6)exit(0);
    for(int i = 0;i<m;i++){
        int s,e;
        cin>>s>>e;
        used[s] = true;
        dfs(s,s);
        int tmp = e;
        dir[i].push_back(e);
        while(tmp != s){
            dir[i].push_back(tmp=pre[tmp]);
        }
        // for(int j = 1;j<=n;j++)cout<<pre[j]<<',';cout<<endl;
        // for(auto &j:dir[i])cout<<j<<',';cout<<endl;
    }
    int choice[m];
    for(int i = 0;i<m;i++)choice[i] = i;
    bool flag = false;
    if(f(choice))flag = true;
    while(next_permutation(choice,choice+m))if(f(choice))flag = true;
    if(flag)cout<<"Yes\n";
    else cout<<"No\n";
    for(int i = 0;i<=n;i++){
        tree[i].clear();
    }
    for(int i =0;i<m;i++)dir[i].clear();
    used.reset();
    return;
}

int main(){
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int t;
    cin>>t;
    while(t--)solve();
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 9 ms 340 KB Output is correct
5 Correct 20 ms 344 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 20 ms 348 KB Output is correct
8 Incorrect 0 ms 340 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 476 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 468 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 476 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 468 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 19 ms 380 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 16 ms 384 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 16 ms 340 KB Output is correct
21 Correct 13 ms 372 KB Output is correct
22 Correct 15 ms 340 KB Output is correct
23 Correct 2 ms 212 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 21 ms 344 KB Output is correct
26 Correct 5 ms 336 KB Output is correct
27 Correct 13 ms 340 KB Output is correct
28 Correct 3 ms 340 KB Output is correct

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 476 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 468 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 19 ms 380 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 16 ms 384 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 16 ms 340 KB Output is correct
21 Correct 13 ms 372 KB Output is correct
22 Correct 15 ms 340 KB Output is correct
23 Correct 2 ms 212 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 21 ms 344 KB Output is correct
26 Correct 5 ms 336 KB Output is correct
27 Correct 13 ms 340 KB Output is correct
28 Correct 3 ms 340 KB Output is correct
29 Incorrect 0 ms 340 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 476 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 468 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 19 ms 380 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 16 ms 384 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 16 ms 340 KB Output is correct
21 Correct 13 ms 372 KB Output is correct
22 Correct 15 ms 340 KB Output is correct
23 Correct 2 ms 212 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 21 ms 344 KB Output is correct
26 Correct 5 ms 336 KB Output is correct
27 Correct 13 ms 340 KB Output is correct
28 Correct 3 ms 340 KB Output is correct
29 Incorrect 0 ms 340 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Incorrect 0 ms 212 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 9 ms 340 KB Output is correct
5 Correct 20 ms 344 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 20 ms 348 KB Output is correct
8 Incorrect 0 ms 340 KB Output isn't correct
9 Halted 0 ms 0 KB -