Submission #748956

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
748956	2023-05-27 08:02:51	WongChun1234	Tourism (JOI23_tourism)	C++14	100 / 100	1112 ms	32332 KiB

tourism

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#include<bits/stdc++.h>
using namespace std;
const int N=100050;
int n,m,q,u,v,c[N],sz[N],ch[N],pre[N],post[N],lift[20][N],pt;
int hd[N],rpar[N],bit[N],lcaa,ans[N];
vector<int> adj[N];
vector<pair<int,int>> qs[N];
set<pair<int,int>> s;
void calcsize(int nde,int par){
    sz[nde]=1;
    for (int i:adj[nde]) if (i!=par){
        calcsize(i,nde);
        sz[nde]+=sz[i];
        if (sz[i]>sz[ch[nde]]) ch[nde]=i;
    }
}
void prehld(int nde,int par){
    lift[0][nde]=rpar[nde]=par;
    for (int i=1;i<19;i++) lift[i][nde]=lift[i-1][lift[i-1][nde]];
    pre[nde]=++pt;
    if (sz[nde]>1){
        hd[ch[nde]]=hd[nde];
        prehld(ch[nde],nde);
    }
    for (int i:adj[nde]) if (i!=par&&i!=ch[nde]){
        hd[i]=i;
        prehld(i,nde);
    }
    post[nde]=pt;
}
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 7 / 7
• Subtask 4: 18 / 18
• Subtask 5: 24 / 24
• Subtask 6: 41 / 41