Submission #889688

#	Time	Username	Problem	Language	Result	Execution time	Memory
889688		vjudge1	Tourism (JOI23_tourism)	C++17	5 / 100	5008 ms	1048576 KiB

tourism

#include <bits/stdc++.h>
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
using namespace std;
const int N=1e5+5;
int mn[N*4],mx[N*4],c[N];
void build(int v,int tl,int tr){
    if(tl==tr){
        mn[v]=c[tl];
        mx[v]=c[tl];
    }
    else{
        int tm=(tl+tr)/2;
        build(v*2,tl,tm);
        build(v*2+1,tm+1,tr);
        mn[v]=min(mn[v*2],mn[v*2+1]);
        mx[v]=max(mx[v*2],mx[v*2+1]);
    }
}
int get_mn(int v,int tl,int tr,int l,int r){
    if(r<tl or l>tr)return INT_MAX;
    if(l<=tl && tr<=r)return mn[v];
    int tm=(tl+tr)/2;
    return min(get_mn(v*2,tl,tm,l,r),get_mn(v*2+1,tm+1,tr,l,r));
}
int get_mx(int v,int tl,int tr,int l,int r){
    if(r<tl or l>tr)return INT_MIN;
    if(l<=tl && tr<=r)return mx[v];
    int tm=(tl+tr)/2;
    return max(get_mx(v*2,tl,tm,l,r),get_mx(v*2+1,tm+1,tr,l,r));
}
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);
    int n,m,qq;
    cin>>n>>m>>qq;
    vector <int> g[n+1];
    int cnt=0;
    for(int i=0;i<n-1;i++){
        int u,v;
        cin>>u>>v;
        if(u==v+1)cnt++;
        g[u].pb(v);
        g[v].pb(u);
    }
    for(int i=1;i<=m;i++){
        cin>>c[i];
    }
    if(cnt==n-1){
        build(1,1,m);
        while(qq--){
            int l,r;
            cin>>l>>r;
            cout<<get_mx(1,1,m,l,r)-get_mn(1,1,m,l,r)+1<<"\n";
        }
        return 0;
    }
    queue <int> q;
    vector <vector <int> > d(n+1,vector <int> (n+1,-1));
    vector <vector <int> > p(n+1,vector <int> (n+1));
    for(int i=1;i<=n;i++){
        q.push(i);
        d[i][i]=0;
        while(!q.empty()){
            int v=q.front();
            q.pop();
            for(auto to : g[v]){
                if(d[i][to]==-1){
                    d[i][to]=d[i][v]+1;
                    p[i][to]=v;
                    q.push(to);
                }
            }
        }
    }
    
    
    
    while(qq--){
        int l,r;
        cin>>l>>r;
        set <int> st;
        if(l==r)st.insert(l);
        for(int i=l;i<r;i++){
            int x=c[i+1];
            st.insert(x);st.insert(c[i]);
            while(x!=c[i]){
                x=p[c[i]][x];
                st.insert(x);
            }
        }
        cout<<st.size()<<"\n";
    }
       
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 7
• Subtask 4: 0 / 18
• Subtask 5: 0 / 24
• Subtask 6: 0 / 41