Submission #61691

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
61691	2018-07-26 10:42:18	Diuven	Min-max tree (BOI18_minmaxtree)	C++11	22 / 100	534 ms	34512 KiB

minmaxtree

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
const int MX=70010, inf=2e9, LG=18;
int n;
pii E[MX];
vector<int> G1[MX];
int nu[MX], ri[MX];
int sp[MX][LG], dep[MX];
void dfs1(int v, int p, int d=1){
    static int now=0;
    nu[v]=++now; ri[v]=nu[v]; dep[v]=d;
    for(int i=1; i<LG; i++) sp[v][i]=sp[sp[v][i-1]][i-1];
    for(int x:G1[v]) if(nu[x]==0) sp[x][0]=v, dfs1(x,v,d+1), ri[v]=max(ri[v], ri[x]);
}
void init_tree(){
    cin>>n;
    for(int i=1; i<n; i++){
        int u,v; cin>>u>>v;
        G1[u].push_back(v);
        G1[v].push_back(u);
        E[i]={u,v};
    }
    dfs1(1,-1);
}
 
 
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• Subtask 1: 0 / 7
• Subtask 2: 22 / 22
• Subtask 3: 0 / 29
• Subtask 4: 0 / 42