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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#808645#8551. DFS Order 5ucup-team2179WA 44ms3840kbC++203.3kb2024-12-10 23:00:312024-12-10 23:00:31

Judging History

你现在查看的是最新测评结果

  • [2024-12-10 23:00:31]
  • 评测
  • 测评结果:WA
  • 用时:44ms
  • 内存:3840kb
  • [2024-12-10 23:00:31]
  • 提交

answer

#include<bits/stdc++.h>
#define int long long
#define pb push_back
#define pii pair<int, int>
using namespace std;
struct ollca{
    vector<vector<int> > adj;
    vector<int>L;
    vector<int>dfn;
    vector<int>siz;
    vector<int>fa;
    int cnt=0,n;
    vector<vector<int> >mylist;
    void dfs(int u,int f){
        cnt++;
        dfn[cnt]=u;
        L[u]=cnt;
        siz[u]++;
        for(auto p:adj[u]){
            if(p==f)continue;
            fa[p]=u;
            dfs(p,u);
            cnt++;
            dfn[cnt]=u;
            siz[u]+=siz[p];
        }
    }
    int op(int l,int r){
        if(L[l]<L[r])return l;
        return r;
    };
    ollca(){}
    ollca(vector<vector<int> > a,int root){
        adj=a;
        n=a.size()-1;
        L.resize(n+1);
        fa.resize(n+1);
        siz.resize(n+1);
        dfn.resize(n*2);
        dfs(root,0);
        mylist=vector<vector<int>>(2*n+1,vector<int>(__lg(2*n-1)+1));
        for(int i=1;i<=2*n-1;i++)
        mylist[i][0]=dfn[i];
        for(int j=1;j<=__lg(2*n-1);j++)
        for(int i=1;i<=2*n-1-(1<<j)+1;i++)
            mylist[i][j]=op(mylist[i][j-1],mylist[i+(1<<j-1)][j-1]);
    }
    int lca(int l,int r){
        l=L[l];
        r=L[r];
        if(l>r)swap(l,r);
        int len=__lg(r-l+1);
        return op(mylist[l][len],mylist[r-(1<<len)+1][len]);
    }
}tr;
int LCA(int u, int v) {
    return tr.lca(u, v);
}
struct stable {
    vector<vector<int>> mylist;
    int n;
    int (*op) (int a, int b);
    stable(vector<int>&a, int(*f)(int, int)) {
        op = f;
        n = a.size() - 1;
        mylist = vector<vector<int>> (n + 1, vector<int>(__lg(n) + 1));
        for (int i = 1; i <= n; i++) mylist[i][0] = a[i];
        for (int j = 1; j <= __lg(n); j++)
            for (int i = 1; i <= n - (1 << j) + 1; i++)
                mylist[i][j] = op(mylist[i][j - 1], mylist[i + (1 << j - 1)][j - 1]);
    }
    int q(int l, int r) {
        assert(l >= 1 && r <= n && l <= r);
        int len = __lg(r - l + 1);
        return op(mylist[l][len], mylist[r - (1 << len) + 1][len]);
    }
};
void solve() {
    int n, q; cin >> n >> q;
    vector<vector<int> > a(n+1);
    for (int i = 1; i < n; i++) {
        int u, v; cin >> u >> v;
        a[u].push_back(v);
        a[v].push_back(u);
    }
    tr=ollca(a,1);
    while (q--) {
        int k; cin >> k;
        set<int> s;
        vector<int> arr(k + 1);
        for (int i = 1; i <= k; i++) cin >> arr[i], s.insert(arr[i]);
        if (s.size() != k) {
            cout << "No\n";
            continue;
        }
        s.clear();
        stable st(arr, LCA);
        int flag = 1;
        for (int i = 1; i < k && flag; i++)
            flag &= (LCA(arr[i], arr[i + 1]) == tr.fa[arr[i + 1]]);
        for (int i = 1; i <= k && flag; i++) {
            flag &= (arr[i] == st.q(i, min(k, i + tr.siz[arr[i]] - 1)));
        }
        for (int i = 1; i <= k && flag; i++) {
            if(s.lower_bound(tr.L[arr[i]])!=s.end()&&*s.lower_bound(tr.L[arr[i]])<=tr.L[arr[i]]+tr.siz[arr[i]]-1)flag=0;
            s.insert(tr.L[arr[i]]);
        }
        if (flag) cout << "Yes\n";
        else cout << "No\n";
    }
}
signed main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int t = 1;
    // cin >> t;
    while (t--) solve();
    return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 1ms
memory: 3600kb

input:

6 7
1 2
1 3
2 4
3 5
2 6
2 4 1
2 4 2
2 4 3
2 4 4
2 4 5
2 4 6
6 1 2 6 4 3 5

output:

No
No
Yes
No
No
Yes
Yes

result:

ok 7 tokens

Test #2:

score: -100
Wrong Answer
time: 44ms
memory: 3840kb

input:

10 100000
7 2
1 7
7 10
8 6
8 7
1 3
4 5
9 5
5 8
8 8 9 7 2 8 1 6 1
4 8 3 5 2
6 7 10 3 9 9 1
1 1
8 10 3 2 9 3 8 7 3
7 5 6 2 8 5 9 1
6 3 4 6 2 1 3
5 8 9 2 4 9
1 3
2 1 5
5 8 5 1 7 9
10 5 2 9 2 6 4 10 6 3 8
3 4 5 8
2 8 4
9 4 10 1 2 4 3 3 6 3
1 3
6 1 1 6 8 3 1
3 7 3 2
3 9 1 5
4 3 7 8 10
9 4 2 3 10 2 5 4 3 ...

output:

No
No
No
Yes
No
No
No
No
Yes
No
No
No
No
No
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
No
No
No
No
Yes
No
No
No
No
No
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
Yes
Yes
No
No
No
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
N...

result:

wrong answer 3780th words differ - expected: 'No', found: 'Yes'