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답안 #949754

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
949754 2024-03-19T15:52:59 Z andrei_boaca Tourism (JOI23_tourism) C++17
28 / 100
 5000 ms 62852 KB 
#include <bits/stdc++.h>
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("fast-math")
#pragma GCC optimize ("unroll-loops")
using namespace std;
mt19937 rng(chrono::steady_clock().now().time_since_epoch().count());
typedef pair<int,int> pii;
int bucksize=100;
int n,m,q,c[100005],niv[100005],in[100005],out[100005],lin[500005],rmq[21][500005],loga[500005],timp,par[100005];
int sol[100005],nivmin,cnt;
set<int> s;
vector<int> muchii[100005];
void dfs(int nod)
{
    timp++;
    lin[timp]=nod;
    in[nod]=timp;
    bool have=0;
    for(int i:muchii[nod])
        if(i!=par[nod])
        {
            par[i]=nod;
            niv[i]=niv[nod]+1;
            dfs(i);
            timp++;
            lin[timp]=nod;
            have=1;
        }
    if(!have)
    {
        timp++;
        lin[timp]=nod;
    }
    out[nod]=timp;
}
struct date
{
    int l,r,ind;
};
int getbuck(int x)
{
    return x/bucksize+(x%bucksize!=0);
}
bool byr(date a, date b)
{
    return a.r<b.r;
}
vector<date> qr[100005];
bool isancestor(int a,int b)
{
    return in[a]<=in[b]&&out[a]>=out[b];
}
int getmin(int l,int r)
{
    int lg=loga[r-l+1];
    int a=rmq[lg][r-(1<<lg)+1];
    int b=rmq[lg][l];
    if(niv[a]<niv[b])
        return a;
    return b;
}
int LCA(int a,int b)
{
    if(in[a]>in[b])
        swap(a,b);
    if(isancestor(a,b))
        return a;
    int l=out[a];
    int r=in[b];
    return getmin(l,r);
}
void addnode(int nod)
{
    if(s.find(in[nod])!=s.end())
        return;
    s.insert(in[nod]);
    if(s.size()==1)
    {
        nivmin=niv[nod];
        cnt=nivmin+1;
        return;
    }
    int nmin=1e9;
    int nmax=0;
    auto it=s.find(in[nod]);
    bool have=0;
    if(it!=s.begin())
    {
        int st=lin[(*prev(it))];
        int x=LCA(st,nod);
        nmin=min(nmin,niv[x]);
        nmax=max(nmax,niv[x]);
    }
    it++;
    if(it!=s.end())
    {
        int dr=lin[(*it)];
        if(isancestor(nod,dr))
            have=1;
        int x=LCA(nod,dr);
        nmin=min(nmin,niv[x]);
        nmax=max(nmax,niv[x]);
    }
    if(nivmin>nmin)
    {
        if(!have)
            cnt+=niv[nod]-nmin;
        nivmin=min(nivmin,nmin);
    }
    else
    {
        if(!have)
            cnt+=niv[nod]-nmax;
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>m>>q;
    for(int i=1;i<n;i++)
    {
        int a,b;
        cin>>a>>b;
        /*a=i+1;
        b=rng()%i+1;*/
        muchii[a].push_back(b);
        muchii[b].push_back(a);
    }
    for(int i=1;i<=m;i++)
    {
        cin>>c[i];
        //c[i]=rng()%n+1;
    }
    dfs(1);
    for(int i=1;i<=timp;i++)
    {
        for(int bit=0;bit<=20;bit++)
            if((1<<bit)<=i)
                loga[i]=bit;
    }
    for(int i=1;i<=timp;i++)
        rmq[0][i]=lin[i];
    for(int j=1;j<=20;j++)
        for(int i=1;i<=timp;i++)
        {
            rmq[j][i]=rmq[j-1][i];
            int poz=i+(1<<(j-1));
            if(poz<=timp&&niv[rmq[j-1][poz]]<niv[rmq[j][i]])
                rmq[j][i]=rmq[j-1][poz];
        }
    int bmax=0;
    for(int i=1;i<=q;i++)
    {
        int l,r;
        cin>>l>>r;
        /*l=rng()%m+1;
        r=rng()%m+1;
        if(l>r)
            swap(l,r);*/
        int b=getbuck(l);
        bmax=max(bmax,b);
        qr[b].push_back({l,r,i});
    }
    for(int b=1;b<=bmax;b++)
        if(!qr[b].empty())
        {
            sort(qr[b].begin(),qr[b].end(),byr);
            reverse(qr[b].begin(),qr[b].end());
            while(!qr[b].empty()&&getbuck(qr[b].back().r)==b)
            {
                int l=qr[b].back().l;
                int r=qr[b].back().r;
                int ind=qr[b].back().ind;
                qr[b].pop_back();
                s.clear();
                nivmin=niv[c[l]];
                cnt=nivmin+1;
                s.insert(in[c[l]]);
                for(int i=l+1;i<=r;i++)
                {
                    int nod=c[i];
                    addnode(nod);
                }
                sol[ind]=cnt-nivmin;
            }
            s.clear();
            int poz=b*bucksize;
            cnt=0;
            nivmin=0;
            while(!qr[b].empty())
            {
                int l=qr[b].back().l;
                int r=qr[b].back().r;
                int ind=qr[b].back().ind;
                qr[b].pop_back();
                while(poz<r)
                {
                    poz++;
                    int nod=c[poz];
                    addnode(nod);
                }
                int last=b*bucksize;
                int auxniv=nivmin;
                int auxcnt=cnt;
                vector<int> toerase;
                assert(last-l+1<=bucksize);
                for(int i=l;i<=last;i++)
                {
                    int nod=c[i];
                    if(s.find(in[nod])!=s.end())
                        continue;
                    toerase.push_back(in[nod]);
                    addnode(nod);
                }
                sol[ind]=cnt-nivmin;
                for(int p:toerase)
                    s.erase(p);
                nivmin=auxniv;
                cnt=auxcnt;
            }
        }
    for(int i=1;i<=q;i++)
        cout<<sol[i]<<'\n';
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 51800 KB Output is correct
2 Correct 7 ms 51848 KB Output is correct
3 Correct 7 ms 51804 KB Output is correct
4 Correct 9 ms 51804 KB Output is correct
5 Correct 8 ms 51864 KB Output is correct
6 Correct 8 ms 51800 KB Output is correct
7 Correct 8 ms 51804 KB Output is correct
8 Correct 8 ms 51800 KB Output is correct
9 Correct 9 ms 51800 KB Output is correct
10 Correct 10 ms 52060 KB Output is correct
11 Correct 8 ms 51804 KB Output is correct
12 Correct 8 ms 51804 KB Output is correct
13 Correct 9 ms 51800 KB Output is correct
14 Correct 8 ms 51800 KB Output is correct
15 Correct 8 ms 51804 KB Output is correct
16 Correct 8 ms 51804 KB Output is correct
17 Correct 9 ms 51804 KB Output is correct
18 Correct 9 ms 51804 KB Output is correct
19 Correct 9 ms 51988 KB Output is correct
20 Correct 9 ms 51804 KB Output is correct
21 Correct 9 ms 51904 KB Output is correct
22 Correct 9 ms 51904 KB Output is correct
23 Correct 9 ms 51800 KB Output is correct
24 Correct 9 ms 51980 KB Output is correct
25 Correct 9 ms 51976 KB Output is correct
26 Correct 8 ms 51952 KB Output is correct
27 Correct 6 ms 51804 KB Output is correct
28 Correct 8 ms 51804 KB Output is correct
29 Correct 7 ms 52060 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 51800 KB Output is correct
2 Correct 7 ms 51848 KB Output is correct
3 Correct 7 ms 51804 KB Output is correct
4 Correct 9 ms 51804 KB Output is correct
5 Correct 8 ms 51864 KB Output is correct
6 Correct 8 ms 51800 KB Output is correct
7 Correct 8 ms 51804 KB Output is correct
8 Correct 8 ms 51800 KB Output is correct
9 Correct 9 ms 51800 KB Output is correct
10 Correct 10 ms 52060 KB Output is correct
11 Correct 8 ms 51804 KB Output is correct
12 Correct 8 ms 51804 KB Output is correct
13 Correct 9 ms 51800 KB Output is correct
14 Correct 8 ms 51800 KB Output is correct
15 Correct 8 ms 51804 KB Output is correct
16 Correct 8 ms 51804 KB Output is correct
17 Correct 9 ms 51804 KB Output is correct
18 Correct 9 ms 51804 KB Output is correct
19 Correct 9 ms 51988 KB Output is correct
20 Correct 9 ms 51804 KB Output is correct
21 Correct 9 ms 51904 KB Output is correct
22 Correct 9 ms 51904 KB Output is correct
23 Correct 9 ms 51800 KB Output is correct
24 Correct 9 ms 51980 KB Output is correct
25 Correct 9 ms 51976 KB Output is correct
26 Correct 8 ms 51952 KB Output is correct
27 Correct 6 ms 51804 KB Output is correct
28 Correct 8 ms 51804 KB Output is correct
29 Correct 7 ms 52060 KB Output is correct
30 Correct 22 ms 52060 KB Output is correct
31 Correct 22 ms 52056 KB Output is correct
32 Correct 32 ms 52140 KB Output is correct
33 Correct 27 ms 52056 KB Output is correct
34 Correct 29 ms 52152 KB Output is correct
35 Correct 18 ms 52152 KB Output is correct
36 Correct 17 ms 52056 KB Output is correct
37 Correct 17 ms 52060 KB Output is correct
38 Correct 26 ms 52056 KB Output is correct
39 Correct 26 ms 52060 KB Output is correct
40 Correct 26 ms 52060 KB Output is correct
41 Correct 18 ms 52056 KB Output is correct
42 Correct 21 ms 52312 KB Output is correct
43 Correct 18 ms 52060 KB Output is correct
44 Correct 26 ms 52060 KB Output is correct
45 Correct 27 ms 52192 KB Output is correct
46 Correct 26 ms 52060 KB Output is correct
47 Correct 19 ms 52060 KB Output is correct
48 Correct 19 ms 52056 KB Output is correct
49 Correct 19 ms 52192 KB Output is correct
50 Correct 30 ms 52124 KB Output is correct
51 Correct 26 ms 52056 KB Output is correct
52 Correct 26 ms 52060 KB Output is correct
53 Correct 30 ms 52156 KB Output is correct
54 Correct 26 ms 52060 KB Output is correct
55 Correct 26 ms 52060 KB Output is correct
56 Correct 7 ms 51812 KB Output is correct
57 Correct 8 ms 52060 KB Output is correct
58 Correct 8 ms 52060 KB Output is correct

Subtask #3
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 51800 KB Output is correct
2 Correct 7 ms 51804 KB Output is correct
3 Correct 7 ms 51892 KB Output is correct
4 Execution timed out 5014 ms 62852 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 51804 KB Output is correct
2 Correct 48 ms 54732 KB Output is correct
3 Correct 51 ms 55212 KB Output is correct
4 Correct 61 ms 55396 KB Output is correct
5 Correct 82 ms 59984 KB Output is correct
6 Correct 84 ms 58196 KB Output is correct
7 Correct 92 ms 57368 KB Output is correct
8 Correct 90 ms 57172 KB Output is correct
9 Correct 80 ms 56912 KB Output is correct
10 Correct 99 ms 56920 KB Output is correct
11 Correct 84 ms 56920 KB Output is correct
12 Correct 110 ms 56852 KB Output is correct
13 Correct 77 ms 57172 KB Output is correct
14 Correct 87 ms 57616 KB Output is correct
15 Correct 76 ms 59132 KB Output is correct
16 Correct 88 ms 58876 KB Output is correct
17 Correct 81 ms 58736 KB Output is correct
18 Correct 95 ms 58724 KB Output is correct
19 Correct 79 ms 60020 KB Output is correct
20 Correct 93 ms 58892 KB Output is correct
21 Correct 81 ms 57716 KB Output is correct
22 Correct 83 ms 57260 KB Output is correct
23 Correct 78 ms 57280 KB Output is correct
24 Correct 73 ms 57136 KB Output is correct
25 Correct 72 ms 56968 KB Output is correct
26 Correct 88 ms 57104 KB Output is correct
27 Correct 79 ms 53596 KB Output is correct
28 Correct 85 ms 57068 KB Output is correct
29 Correct 76 ms 57140 KB Output is correct
30 Correct 78 ms 57124 KB Output is correct
31 Correct 67 ms 57156 KB Output is correct
32 Correct 73 ms 57532 KB Output is correct
33 Correct 68 ms 56872 KB Output is correct
34 Correct 68 ms 59220 KB Output is correct

Subtask #5
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 47708 KB Output is correct
2 Correct 7 ms 49756 KB Output is correct
3 Correct 8 ms 51804 KB Output is correct
4 Execution timed out 5097 ms 59276 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 51800 KB Output is correct
2 Correct 7 ms 51848 KB Output is correct
3 Correct 7 ms 51804 KB Output is correct
4 Correct 9 ms 51804 KB Output is correct
5 Correct 8 ms 51864 KB Output is correct
6 Correct 8 ms 51800 KB Output is correct
7 Correct 8 ms 51804 KB Output is correct
8 Correct 8 ms 51800 KB Output is correct
9 Correct 9 ms 51800 KB Output is correct
10 Correct 10 ms 52060 KB Output is correct
11 Correct 8 ms 51804 KB Output is correct
12 Correct 8 ms 51804 KB Output is correct
13 Correct 9 ms 51800 KB Output is correct
14 Correct 8 ms 51800 KB Output is correct
15 Correct 8 ms 51804 KB Output is correct
16 Correct 8 ms 51804 KB Output is correct
17 Correct 9 ms 51804 KB Output is correct
18 Correct 9 ms 51804 KB Output is correct
19 Correct 9 ms 51988 KB Output is correct
20 Correct 9 ms 51804 KB Output is correct
21 Correct 9 ms 51904 KB Output is correct
22 Correct 9 ms 51904 KB Output is correct
23 Correct 9 ms 51800 KB Output is correct
24 Correct 9 ms 51980 KB Output is correct
25 Correct 9 ms 51976 KB Output is correct
26 Correct 8 ms 51952 KB Output is correct
27 Correct 6 ms 51804 KB Output is correct
28 Correct 8 ms 51804 KB Output is correct
29 Correct 7 ms 52060 KB Output is correct
30 Correct 22 ms 52060 KB Output is correct
31 Correct 22 ms 52056 KB Output is correct
32 Correct 32 ms 52140 KB Output is correct
33 Correct 27 ms 52056 KB Output is correct
34 Correct 29 ms 52152 KB Output is correct
35 Correct 18 ms 52152 KB Output is correct
36 Correct 17 ms 52056 KB Output is correct
37 Correct 17 ms 52060 KB Output is correct
38 Correct 26 ms 52056 KB Output is correct
39 Correct 26 ms 52060 KB Output is correct
40 Correct 26 ms 52060 KB Output is correct
41 Correct 18 ms 52056 KB Output is correct
42 Correct 21 ms 52312 KB Output is correct
43 Correct 18 ms 52060 KB Output is correct
44 Correct 26 ms 52060 KB Output is correct
45 Correct 27 ms 52192 KB Output is correct
46 Correct 26 ms 52060 KB Output is correct
47 Correct 19 ms 52060 KB Output is correct
48 Correct 19 ms 52056 KB Output is correct
49 Correct 19 ms 52192 KB Output is correct
50 Correct 30 ms 52124 KB Output is correct
51 Correct 26 ms 52056 KB Output is correct
52 Correct 26 ms 52060 KB Output is correct
53 Correct 30 ms 52156 KB Output is correct
54 Correct 26 ms 52060 KB Output is correct
55 Correct 26 ms 52060 KB Output is correct
56 Correct 7 ms 51812 KB Output is correct
57 Correct 8 ms 52060 KB Output is correct
58 Correct 8 ms 52060 KB Output is correct
59 Correct 6 ms 51800 KB Output is correct
60 Correct 7 ms 51804 KB Output is correct
61 Correct 7 ms 51892 KB Output is correct
62 Execution timed out 5014 ms 62852 KB Time limit exceeded
63 Halted 0 ms 0 KB -