제출 #778438

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
778438		vjudge1	Deblo (COCI18_deblo)	C++17	45 / 90	1089 ms	16424 KiB

deblo

#include<bits/stdc++.h>
using namespace std;
#define lalala ios_base::sync_with_stdio(false);cin.tie(NULL);
#define endl "\n"
#define ll long long
#define pb push_back
#define N 100001
#define f first
#define s second
ll int cev=0;
int arr[N];
vector<int> adj[N];
int yukar[N],asa[N], isaret[N];
ll int dfs(int x,int once,int prevgel){
	ll int topla=0;
	if(isaret[x]==0)topla=prevgel^arr[x];
	for(auto u:adj[x]){
		if(u==once) continue;
		topla+=dfs(u,x,prevgel^arr[x]);
	}
	return topla;
}

vector<int> yol;
void uff(int x,int once){
	for(auto u:adj[x]){
		if(u!=once)uff(u,x);
	}
	yol.pb(x);
}
int main(){
	lalala;
	int n;cin>>n;
	for(int i=1;i<=n;i++)cin>>arr[i];
	for(int i=0;i<n-1;i++){
		int a,b;cin>>a>>b;
		adj[a].pb(b);
		adj[b].pb(a);
	}
	uff(1,0);
	reverse(yol.begin(),yol.end());
	ll int cev=0;
	for(auto u:yol){
		cev+=dfs(u,-1,0);
		//cout<<cev<<" "<<u<<endl;
		isaret[u]=1;
	}
	cout<<cev<<endl;
	


}

• Subtask 1: 45 / 90