Submission #240936

#	Time	Username	Problem	Language	Result	Execution time	Memory
240936		DavidDamian	Deblo (COCI18_deblo)	C++11	45 / 90	1096 ms	14712 KiB

deblo

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
///Subtask 2
///DFS from all nodes
int n;
ll A[100005];
ll total=0;
vector<int> adjList[100005];
ll dfs(int u,int e,ll Xor)
{
    ll sum=Xor;
    for(int v: adjList[u]){
        if(v==e) continue;
        sum+=dfs(v,u,Xor^A[v]);
    }
    return sum;
}
int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>A[i];
        total+=A[i];
    }
    for(int i=1;i<=n-1;i++){
        int a,b;
        cin>>a>>b;
        adjList[a].push_back(b);
        adjList[b].push_back(a);
    }
    for(int i=1;i<=n;i++){
        total+=dfs(i,0,A[i]);
    }
    total/=2;
    cout<<total<<'\n';
    return 0;
}

• Subtask 1: 45 / 90