oj.uz

Submission #892739

# Submission time Handle Problem Language Result Execution time Memory
892739 2023-12-25T19:41:01 Z alexander707070 Tourism (JOI23_tourism) C++14
10 / 100
 5000 ms 39120 KB 
#include<bits/stdc++.h>
#define MAXN 100007
using namespace std;

const int bucket_sz=200;

struct qr{
    int l,r,id;
}qs[MAXN];

struct node{
    int l,r;
}w[MAXN];

struct event{
    int type,ind,val,tim;
};

stack<event> st;

int n,m,q,a,b,tt,dist[MAXN],bucket[MAXN],l,r,cnt[MAXN],tim,sum,last,ans[MAXN];
int c[MAXN],num[MAXN],ret[MAXN],fr[MAXN];
vector<int> v[MAXN],euler;

void dfs(int x,int p,int d){
    tt++; num[x]=tt; ret[tt]=x;
    dist[x]=d;

    fr[x]=int(euler.size());
    euler.push_back(num[x]);

    for(int i=0;i<v[x].size();i++){
        if(v[x][i]==p)continue;
        dfs(v[x][i],x,d+1);

        euler.push_back(num[x]);
    }
}

bool li[4*MAXN][20];
int dp[4*MAXN][20];

int lg[4*MAXN],power[20];

void calc(){
    power[0]=1;
    for(int i=1;i<20;i++)power[i]=power[i-1]*2;
    lg[1]=0;
    for(int i=2;i<=4*n;i++)lg[i]=lg[i/2]+1;
}

int rmq(int i,int j){
    if(j==0)return euler[i];

    if(li[i][j])return dp[i][j];
    li[i][j]=true;

    dp[i][j]=min( rmq(i,j-1) , rmq(i+power[j-1],j-1) );
    return dp[i][j];
}

int lca(int x,int y){
    if(fr[x]>fr[y])swap(x,y);
    x=fr[x]; y=fr[y];

    return ret[ min( rmq(x,lg[y-x+1]) , rmq(y-power[lg[y-x+1]]+1,lg[y-x+1]) ) ];
}

int distance(int x,int y){
    if(x==0 or y==n+1)return 0;

    return dist[x]+dist[y]-2*dist[lca(x,y)];
}

bool cmp(qr fr,qr sc){
    if(bucket[fr.l]!=bucket[sc.l])return bucket[fr.l]<bucket[sc.l];
    return fr.r>sc.r;   
}

void insertv(int x,int y,int z){
    sum-=distance(ret[y],ret[z]);
    sum+=distance(ret[y],ret[x]);
    sum+=distance(ret[x],ret[z]);

    w[x].l=y; w[x].r=z;
    w[y].r=x; w[z].l=x;
}

void erasev(int x){
    st.push({1,w[x].l,x,tim});
    st.push({2,w[x].r,x,tim});

    w[w[x].l].r=w[x].r;
    w[w[x].r].l=w[x].l;
}

void rem(int x){
    if(x==0){
        tim++; return;
    }

    tim++;
    x=num[c[x]];
    cnt[x]--;

    if(cnt[x]!=0)return;

    st.push({3,0,sum,tim});

    sum-=distance(ret[w[x].l],ret[x]);
    sum-=distance(ret[x],ret[w[x].r]);
    sum+=distance(ret[w[x].l],ret[w[x].r]);

    erasev(x);
}

void undo(){
    while(!st.empty() and st.top().tim==tim){
        if(st.top().type==1){
            w[st.top().ind].r=st.top().val;
        }
        if(st.top().type==2){
            w[st.top().ind].l=st.top().val;
        }
        if(st.top().type==3){
            sum=st.top().val;
        }

        st.pop();
    }
    tim--;
}

void reset(){
    tim=sum=0;
    while(!st.empty())st.pop();
    for(int i=1;i<=n;i++)cnt[i]=0;
}

int edge(){
    int lx=w[0].r,rx=w[n+1].l;
    return distance(ret[lx],ret[rx]);
}

int main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n>>m>>q;
    calc();

    for(int i=1;i<=n-1;i++){
        cin>>a>>b;
        v[a].push_back(b);
        v[b].push_back(a);
    }
    dfs(1,0,0);

    w[0].l=n+1;
    w[n+1].r=0;
    ret[n+1]=n+1;

    for(int i=1;i<=m;i++){
        cin>>c[i];
        bucket[i]=i/bucket_sz;
    }

    for(int i=1;i<=q;i++){
        cin>>qs[i].l>>qs[i].r;
        qs[i].id=i;
    }

    sort(qs+1,qs+q+1,cmp);

    for(int i=1;i<=q;i++){
        if(i==1 or bucket[qs[i].l]!=bucket[qs[i-1].l]){
            reset();
            for(int f=bucket[qs[i].l]*bucket_sz;f<=m;f++){
                cnt[num[c[f]]]++;
            }

            last=0;
            for(int f=1;f<=n;f++){
                if(cnt[f]==0)continue;
                insertv(f,last,n+1);
                last=f;
            }
            l=bucket[qs[i].l]*bucket_sz;
            r=m;
        }

        while(r>qs[i].r){
            rem(r); r--;
        }

        while(l<qs[i].l){
            rem(l); l++;
        }

        ans[qs[i].id]=(sum+edge())/2;

        while(l>bucket[qs[i].l]*bucket_sz){
            undo(); l--; cnt[num[c[l]]]++;
        }

    }

    for(int i=1;i<=q;i++){
        cout<<ans[i]+1<<"\n";
    }

    return 0;
}

Compilation message

tourism.cpp: In function 'void dfs(int, int, int)':
tourism.cpp:32:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for(int i=0;i<v[x].size();i++){
      |                 ~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 2 ms 10584 KB Output is correct
4 Correct 2 ms 10584 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 3 ms 10588 KB Output is correct
7 Correct 3 ms 10748 KB Output is correct
8 Correct 2 ms 10768 KB Output is correct
9 Correct 3 ms 10588 KB Output is correct
10 Correct 3 ms 10588 KB Output is correct
11 Correct 3 ms 10588 KB Output is correct
12 Correct 2 ms 10588 KB Output is correct
13 Correct 2 ms 10676 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 3 ms 10588 KB Output is correct
16 Correct 3 ms 10588 KB Output is correct
17 Correct 3 ms 10784 KB Output is correct
18 Correct 4 ms 10588 KB Output is correct
19 Correct 3 ms 10584 KB Output is correct
20 Correct 3 ms 10584 KB Output is correct
21 Correct 3 ms 10588 KB Output is correct
22 Correct 4 ms 10588 KB Output is correct
23 Correct 3 ms 10588 KB Output is correct
24 Correct 3 ms 10588 KB Output is correct
25 Correct 3 ms 10588 KB Output is correct
26 Correct 3 ms 10588 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Correct 3 ms 10584 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 2 ms 10584 KB Output is correct
4 Correct 2 ms 10584 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 3 ms 10588 KB Output is correct
7 Correct 3 ms 10748 KB Output is correct
8 Correct 2 ms 10768 KB Output is correct
9 Correct 3 ms 10588 KB Output is correct
10 Correct 3 ms 10588 KB Output is correct
11 Correct 3 ms 10588 KB Output is correct
12 Correct 2 ms 10588 KB Output is correct
13 Correct 2 ms 10676 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 3 ms 10588 KB Output is correct
16 Correct 3 ms 10588 KB Output is correct
17 Correct 3 ms 10784 KB Output is correct
18 Correct 4 ms 10588 KB Output is correct
19 Correct 3 ms 10584 KB Output is correct
20 Correct 3 ms 10584 KB Output is correct
21 Correct 3 ms 10588 KB Output is correct
22 Correct 4 ms 10588 KB Output is correct
23 Correct 3 ms 10588 KB Output is correct
24 Correct 3 ms 10588 KB Output is correct
25 Correct 3 ms 10588 KB Output is correct
26 Correct 3 ms 10588 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Correct 3 ms 10584 KB Output is correct
30 Correct 11 ms 10844 KB Output is correct
31 Correct 14 ms 10844 KB Output is correct
32 Correct 18 ms 10984 KB Output is correct
33 Correct 15 ms 10844 KB Output is correct
34 Correct 16 ms 10844 KB Output is correct
35 Correct 4 ms 10844 KB Output is correct
36 Correct 6 ms 10844 KB Output is correct
37 Correct 4 ms 10844 KB Output is correct
38 Correct 16 ms 10844 KB Output is correct
39 Correct 16 ms 11316 KB Output is correct
40 Correct 15 ms 11096 KB Output is correct
41 Correct 4 ms 10844 KB Output is correct
42 Correct 4 ms 11068 KB Output is correct
43 Correct 4 ms 10844 KB Output is correct
44 Correct 16 ms 10844 KB Output is correct
45 Correct 16 ms 11012 KB Output is correct
46 Correct 16 ms 10844 KB Output is correct
47 Correct 4 ms 10968 KB Output is correct
48 Correct 4 ms 10844 KB Output is correct
49 Correct 4 ms 10844 KB Output is correct
50 Correct 18 ms 10844 KB Output is correct
51 Correct 15 ms 10844 KB Output is correct
52 Correct 15 ms 10844 KB Output is correct
53 Correct 18 ms 10996 KB Output is correct
54 Correct 16 ms 10844 KB Output is correct
55 Correct 16 ms 10844 KB Output is correct
56 Correct 4 ms 8540 KB Output is correct
57 Correct 2 ms 8796 KB Output is correct
58 Correct 19 ms 10988 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10584 KB Output is correct
2 Correct 2 ms 8800 KB Output is correct
3 Correct 4 ms 8540 KB Output is correct
4 Correct 2379 ms 25504 KB Output is correct
5 Correct 1910 ms 30764 KB Output is correct
6 Correct 2771 ms 34860 KB Output is correct
7 Correct 4177 ms 36892 KB Output is correct
8 Correct 4350 ms 36880 KB Output is correct
9 Correct 4126 ms 36712 KB Output is correct
10 Correct 4866 ms 36856 KB Output is correct
11 Correct 5000 ms 36884 KB Output is correct
12 Correct 305 ms 34204 KB Output is correct
13 Correct 290 ms 34208 KB Output is correct
14 Correct 296 ms 34204 KB Output is correct
15 Correct 58 ms 23544 KB Output is correct
16 Execution timed out 5039 ms 36680 KB Time limit exceeded
17 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 1464 ms 25124 KB Output is correct
3 Correct 3070 ms 28144 KB Output is correct
4 Correct 2894 ms 28628 KB Output is correct
5 Correct 57 ms 35272 KB Output is correct
6 Correct 94 ms 36804 KB Output is correct
7 Correct 201 ms 37824 KB Output is correct
8 Correct 551 ms 38176 KB Output is correct
9 Correct 1497 ms 38316 KB Output is correct
10 Correct 4453 ms 38472 KB Output is correct
11 Execution timed out 5015 ms 38496 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 8536 KB Output is correct
3 Correct 5 ms 8540 KB Output is correct
4 Correct 3725 ms 26932 KB Output is correct
5 Correct 3371 ms 29112 KB Output is correct
6 Correct 4931 ms 35912 KB Output is correct
7 Execution timed out 5052 ms 39120 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 2 ms 10584 KB Output is correct
4 Correct 2 ms 10584 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 3 ms 10588 KB Output is correct
7 Correct 3 ms 10748 KB Output is correct
8 Correct 2 ms 10768 KB Output is correct
9 Correct 3 ms 10588 KB Output is correct
10 Correct 3 ms 10588 KB Output is correct
11 Correct 3 ms 10588 KB Output is correct
12 Correct 2 ms 10588 KB Output is correct
13 Correct 2 ms 10676 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 3 ms 10588 KB Output is correct
16 Correct 3 ms 10588 KB Output is correct
17 Correct 3 ms 10784 KB Output is correct
18 Correct 4 ms 10588 KB Output is correct
19 Correct 3 ms 10584 KB Output is correct
20 Correct 3 ms 10584 KB Output is correct
21 Correct 3 ms 10588 KB Output is correct
22 Correct 4 ms 10588 KB Output is correct
23 Correct 3 ms 10588 KB Output is correct
24 Correct 3 ms 10588 KB Output is correct
25 Correct 3 ms 10588 KB Output is correct
26 Correct 3 ms 10588 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Correct 3 ms 10584 KB Output is correct
30 Correct 11 ms 10844 KB Output is correct
31 Correct 14 ms 10844 KB Output is correct
32 Correct 18 ms 10984 KB Output is correct
33 Correct 15 ms 10844 KB Output is correct
34 Correct 16 ms 10844 KB Output is correct
35 Correct 4 ms 10844 KB Output is correct
36 Correct 6 ms 10844 KB Output is correct
37 Correct 4 ms 10844 KB Output is correct
38 Correct 16 ms 10844 KB Output is correct
39 Correct 16 ms 11316 KB Output is correct
40 Correct 15 ms 11096 KB Output is correct
41 Correct 4 ms 10844 KB Output is correct
42 Correct 4 ms 11068 KB Output is correct
43 Correct 4 ms 10844 KB Output is correct
44 Correct 16 ms 10844 KB Output is correct
45 Correct 16 ms 11012 KB Output is correct
46 Correct 16 ms 10844 KB Output is correct
47 Correct 4 ms 10968 KB Output is correct
48 Correct 4 ms 10844 KB Output is correct
49 Correct 4 ms 10844 KB Output is correct
50 Correct 18 ms 10844 KB Output is correct
51 Correct 15 ms 10844 KB Output is correct
52 Correct 15 ms 10844 KB Output is correct
53 Correct 18 ms 10996 KB Output is correct
54 Correct 16 ms 10844 KB Output is correct
55 Correct 16 ms 10844 KB Output is correct
56 Correct 4 ms 8540 KB Output is correct
57 Correct 2 ms 8796 KB Output is correct
58 Correct 19 ms 10988 KB Output is correct
59 Correct 2 ms 10584 KB Output is correct
60 Correct 2 ms 8800 KB Output is correct
61 Correct 4 ms 8540 KB Output is correct
62 Correct 2379 ms 25504 KB Output is correct
63 Correct 1910 ms 30764 KB Output is correct
64 Correct 2771 ms 34860 KB Output is correct
65 Correct 4177 ms 36892 KB Output is correct
66 Correct 4350 ms 36880 KB Output is correct
67 Correct 4126 ms 36712 KB Output is correct
68 Correct 4866 ms 36856 KB Output is correct
69 Correct 5000 ms 36884 KB Output is correct
70 Correct 305 ms 34204 KB Output is correct
71 Correct 290 ms 34208 KB Output is correct
72 Correct 296 ms 34204 KB Output is correct
73 Correct 58 ms 23544 KB Output is correct
74 Execution timed out 5039 ms 36680 KB Time limit exceeded
75 Halted 0 ms 0 KB -