Submission #1156917

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1156917	2025-02-25 03:08:28	tungkhoa08	Railway (BOI17_railway)	C++17	23 / 100	1114 ms	589824 KiB

railway

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int>i2;
#define fi first
#define se second;
#define pb push_back;
int gu[100005],gv[100005],n,m,k,h[100005],dp[100005][30];
vector <int>kq,g[100005],luu[100005];
set <int> s[100005];
void dfs(int u,int pa){
    for (int v:g[u]){
        if (v!=pa){
            h[v]=h[u]+1;
            dp[v][0]=u;
            dfs(v,u);
        }
    }
}
void ktao(){
    for (int i=1;(1<<i)<=n;i++){
        for (int u=1;u<=n;u++) dp[u][i]=dp[dp[u][i-1]][i-1];
    }
}
int lca(int u,int v){
    if (h[u]<h[v]) swap(u,v);
    if (h[u]!=h[v]){
        int k=h[u]-h[v];
        for (int i=20;i>=0;i--){
            int ok=(k>>i)&1;
 
 
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• Subtask 1: 8 / 8
• Subtask 2: 15 / 15
• Subtask 3: 0 / 7
• Subtask 4: 0 / 29
• Subtask 5: 0 / 16
• Subtask 6: 0 / 25