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Submission #924663

# Submission time Handle Problem Language Result Execution time Memory
924663 2024-02-09T11:37:28 Z ttamx Tourism (JOI23_tourism) C++14
10 / 100
 5000 ms 177412 KB 
#include<bits/stdc++.h>
#include<queue>

using namespace std;

const int N=1e5+5;
const int M=3e5+5;
const int LG=20;

int n,m,q;
int c[N];
vector<int> adj[N];
int sz[N],hv[N],hd[N],pa[N],lv[N],tin[N],tout[N],pos[N];
int timer;
vector<pair<int,int>> qr[N],chain[N];
int ans[N];

struct Fenwick{
    int t[N];
    void update(int i,int v){
        for(;i<N;i+=i&-i)t[i]+=v;
    }
    int query(int i){
        int res=0;
        for(;i;i-=i&-i)res+=t[i];
        return res;
    }
}f;

template<class T,class cmp>
struct RMQ{
    T t[LG][M];
    T get_min(T a,T b){
        return cmp()(a,b)?a:b;
    }
    void build(){
        for(int i=0;i<LG-1;i++){
            for(int j=1;j+(2<<i)-1<M;j++){
                t[i+1][j]=get_min(t[i][j],t[i][j+(1<<i)]);
            }
        }
    }
    T query(int l,int r){
        int k=31-__builtin_clz(r-l+1);
        return get_min(t[k][l],t[k][r-(1<<k)+1]);
    }
};

RMQ<int,less<int>> rtin,rdep;
RMQ<int,greater<int>> rtout;

void dfs(int u,int p=0){
    tin[u]=++timer;
    pos[timer]=u;
    pa[u]=p;
    sz[u]=1;
    for(auto v:adj[u])if(v!=p){
        lv[v]=lv[u]+1;
        dfs(v,u);
        sz[u]+=sz[v];
        if(sz[v]>sz[hv[u]])hv[u]=v;
        pos[++timer]=u;
    }
    tout[u]=timer;
}

void hld(int u,int p=0){
    if(!hd[u])hd[u]=u;
    if(hv[u])hd[hv[u]]=hd[u],hld(hv[u],u);
    for(auto v:adj[u])if(v!=p&&v!=hv[u])hld(v,u);
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> m >> q;
    for(int i=1;i<n;i++){
        int u,v;
        cin >> u >> v;
        adj[u].emplace_back(v);
        adj[v].emplace_back(u);
    }
    for(int i=1;i<=m;i++)cin >> c[i];
    for(int i=1;i<=q;i++){
        int l,r;
        cin >> l >> r;
        qr[r].emplace_back(l,i);
    }
    dfs(1);
    hld(1);
    for(int i=1;i<=timer;i++)rdep.t[0][i]=lv[pos[i]];
    for(int i=1;i<=m;i++){
        rtin.t[0][i]=tin[c[i]];
        rtout.t[0][i]=tout[c[i]];
    }
    rdep.build();
    rtin.build();
    rtout.build();
    for(int r=1;r<=m;r++){
        for(int u=c[r];u;u=pa[u]){
            int h=hd[u];
            auto &ch=chain[h];
            while(!ch.empty()&&lv[ch.back().first]<=lv[u]){
                auto [v,i]=ch.back();
                ch.pop_back();
                int val=lv[v]-lv[h]+1;
                f.update(i,-val);
                if(!ch.empty())f.update(ch.back().second,val);
            }
            int val=lv[u]-lv[h]+1;
            if(!ch.empty())f.update(ch.back().second,-val);
            ch.emplace_back(u,r);
            f.update(r,val);
        }
        for(auto [l,i]:qr[r]){
            int u=rtin.query(l,r),v=rtout.query(l,r);
            ans[i]=f.query(r)-f.query(l-1)-rdep.query(u,v);
        }
    }
    for(int i=1;i<=q;i++)cout << ans[i] << "\n";
}

Compilation message

tourism.cpp: In function 'int main()':
tourism.cpp:103:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  103 |                 auto [v,i]=ch.back();
      |                      ^
tourism.cpp:114:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  114 |         for(auto [l,i]:qr[r]){
      |                  ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 81424 KB Output is correct
2 Correct 22 ms 81496 KB Output is correct
3 Correct 22 ms 81668 KB Output is correct
4 Correct 22 ms 81500 KB Output is correct
5 Correct 22 ms 81556 KB Output is correct
6 Correct 24 ms 81916 KB Output is correct
7 Correct 22 ms 81496 KB Output is correct
8 Correct 22 ms 81500 KB Output is correct
9 Correct 23 ms 81500 KB Output is correct
10 Correct 23 ms 81500 KB Output is correct
11 Correct 23 ms 81668 KB Output is correct
12 Correct 22 ms 81952 KB Output is correct
13 Correct 22 ms 81496 KB Output is correct
14 Correct 24 ms 81544 KB Output is correct
15 Correct 23 ms 81636 KB Output is correct
16 Correct 24 ms 81500 KB Output is correct
17 Correct 24 ms 81492 KB Output is correct
18 Correct 23 ms 81668 KB Output is correct
19 Correct 23 ms 81496 KB Output is correct
20 Correct 23 ms 81700 KB Output is correct
21 Correct 22 ms 81492 KB Output is correct
22 Correct 24 ms 81756 KB Output is correct
23 Correct 22 ms 81672 KB Output is correct
24 Correct 22 ms 81700 KB Output is correct
25 Correct 22 ms 81492 KB Output is correct
26 Correct 22 ms 81500 KB Output is correct
27 Correct 24 ms 81496 KB Output is correct
28 Correct 22 ms 81496 KB Output is correct
29 Correct 22 ms 81496 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 81424 KB Output is correct
2 Correct 22 ms 81496 KB Output is correct
3 Correct 22 ms 81668 KB Output is correct
4 Correct 22 ms 81500 KB Output is correct
5 Correct 22 ms 81556 KB Output is correct
6 Correct 24 ms 81916 KB Output is correct
7 Correct 22 ms 81496 KB Output is correct
8 Correct 22 ms 81500 KB Output is correct
9 Correct 23 ms 81500 KB Output is correct
10 Correct 23 ms 81500 KB Output is correct
11 Correct 23 ms 81668 KB Output is correct
12 Correct 22 ms 81952 KB Output is correct
13 Correct 22 ms 81496 KB Output is correct
14 Correct 24 ms 81544 KB Output is correct
15 Correct 23 ms 81636 KB Output is correct
16 Correct 24 ms 81500 KB Output is correct
17 Correct 24 ms 81492 KB Output is correct
18 Correct 23 ms 81668 KB Output is correct
19 Correct 23 ms 81496 KB Output is correct
20 Correct 23 ms 81700 KB Output is correct
21 Correct 22 ms 81492 KB Output is correct
22 Correct 24 ms 81756 KB Output is correct
23 Correct 22 ms 81672 KB Output is correct
24 Correct 22 ms 81700 KB Output is correct
25 Correct 22 ms 81492 KB Output is correct
26 Correct 22 ms 81500 KB Output is correct
27 Correct 24 ms 81496 KB Output is correct
28 Correct 22 ms 81496 KB Output is correct
29 Correct 22 ms 81496 KB Output is correct
30 Correct 23 ms 81796 KB Output is correct
31 Correct 24 ms 81756 KB Output is correct
32 Correct 25 ms 81744 KB Output is correct
33 Correct 25 ms 81824 KB Output is correct
34 Correct 25 ms 81748 KB Output is correct
35 Correct 27 ms 81748 KB Output is correct
36 Correct 24 ms 81772 KB Output is correct
37 Correct 25 ms 81748 KB Output is correct
38 Correct 78 ms 82196 KB Output is correct
39 Correct 76 ms 82008 KB Output is correct
40 Correct 82 ms 82020 KB Output is correct
41 Correct 94 ms 81812 KB Output is correct
42 Correct 106 ms 82000 KB Output is correct
43 Correct 68 ms 81744 KB Output is correct
44 Correct 53 ms 81880 KB Output is correct
45 Correct 38 ms 81808 KB Output is correct
46 Correct 64 ms 81756 KB Output is correct
47 Correct 52 ms 81924 KB Output is correct
48 Correct 41 ms 81784 KB Output is correct
49 Correct 49 ms 81912 KB Output is correct
50 Correct 23 ms 81824 KB Output is correct
51 Correct 23 ms 81744 KB Output is correct
52 Correct 24 ms 81812 KB Output is correct
53 Correct 24 ms 81760 KB Output is correct
54 Correct 24 ms 81828 KB Output is correct
55 Correct 24 ms 82008 KB Output is correct
56 Correct 27 ms 81688 KB Output is correct
57 Correct 23 ms 81748 KB Output is correct
58 Correct 25 ms 81824 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 81500 KB Output is correct
2 Correct 22 ms 81500 KB Output is correct
3 Correct 24 ms 81732 KB Output is correct
4 Execution timed out 5020 ms 93416 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 81500 KB Output is correct
2 Incorrect 103 ms 84656 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 81488 KB Output is correct
2 Correct 22 ms 81500 KB Output is correct
3 Correct 23 ms 81756 KB Output is correct
4 Runtime error 173 ms 177412 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 81424 KB Output is correct
2 Correct 22 ms 81496 KB Output is correct
3 Correct 22 ms 81668 KB Output is correct
4 Correct 22 ms 81500 KB Output is correct
5 Correct 22 ms 81556 KB Output is correct
6 Correct 24 ms 81916 KB Output is correct
7 Correct 22 ms 81496 KB Output is correct
8 Correct 22 ms 81500 KB Output is correct
9 Correct 23 ms 81500 KB Output is correct
10 Correct 23 ms 81500 KB Output is correct
11 Correct 23 ms 81668 KB Output is correct
12 Correct 22 ms 81952 KB Output is correct
13 Correct 22 ms 81496 KB Output is correct
14 Correct 24 ms 81544 KB Output is correct
15 Correct 23 ms 81636 KB Output is correct
16 Correct 24 ms 81500 KB Output is correct
17 Correct 24 ms 81492 KB Output is correct
18 Correct 23 ms 81668 KB Output is correct
19 Correct 23 ms 81496 KB Output is correct
20 Correct 23 ms 81700 KB Output is correct
21 Correct 22 ms 81492 KB Output is correct
22 Correct 24 ms 81756 KB Output is correct
23 Correct 22 ms 81672 KB Output is correct
24 Correct 22 ms 81700 KB Output is correct
25 Correct 22 ms 81492 KB Output is correct
26 Correct 22 ms 81500 KB Output is correct
27 Correct 24 ms 81496 KB Output is correct
28 Correct 22 ms 81496 KB Output is correct
29 Correct 22 ms 81496 KB Output is correct
30 Correct 23 ms 81796 KB Output is correct
31 Correct 24 ms 81756 KB Output is correct
32 Correct 25 ms 81744 KB Output is correct
33 Correct 25 ms 81824 KB Output is correct
34 Correct 25 ms 81748 KB Output is correct
35 Correct 27 ms 81748 KB Output is correct
36 Correct 24 ms 81772 KB Output is correct
37 Correct 25 ms 81748 KB Output is correct
38 Correct 78 ms 82196 KB Output is correct
39 Correct 76 ms 82008 KB Output is correct
40 Correct 82 ms 82020 KB Output is correct
41 Correct 94 ms 81812 KB Output is correct
42 Correct 106 ms 82000 KB Output is correct
43 Correct 68 ms 81744 KB Output is correct
44 Correct 53 ms 81880 KB Output is correct
45 Correct 38 ms 81808 KB Output is correct
46 Correct 64 ms 81756 KB Output is correct
47 Correct 52 ms 81924 KB Output is correct
48 Correct 41 ms 81784 KB Output is correct
49 Correct 49 ms 81912 KB Output is correct
50 Correct 23 ms 81824 KB Output is correct
51 Correct 23 ms 81744 KB Output is correct
52 Correct 24 ms 81812 KB Output is correct
53 Correct 24 ms 81760 KB Output is correct
54 Correct 24 ms 81828 KB Output is correct
55 Correct 24 ms 82008 KB Output is correct
56 Correct 27 ms 81688 KB Output is correct
57 Correct 23 ms 81748 KB Output is correct
58 Correct 25 ms 81824 KB Output is correct
59 Correct 22 ms 81500 KB Output is correct
60 Correct 22 ms 81500 KB Output is correct
61 Correct 24 ms 81732 KB Output is correct
62 Execution timed out 5020 ms 93416 KB Time limit exceeded
63 Halted 0 ms 0 KB -