제출 #228944

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
228944		VEGAnn	Deblo (COCI18_deblo)	C++14	0 / 90	103 ms	65144 KiB

deblo

#include <bits/stdc++.h>
#define PB push_back
using namespace std;
typedef long long ll;
const int N = 100100;
const int PW = 22;
ll ans = 0;
vector<int> g[N];
int n, vl[N], kol[2][PW][N];

void dfs(int v, int p){
    ans += vl[v];

    for (int po = 0; po < PW; po++)
        kol[bool(vl[v] & (1 << po))][po][v]++;

    for (int u : g[v]){
        if (u == p) continue;
        dfs(u, v);

        for (int po = 0; po < PW; po++){
            ans += 1ll * kol[0][po][v] * kol[1][po][u];
            ans += 1ll * kol[1][po][v] * kol[0][po][u];

            int bt = bool(vl[v] & (1 << po));

            kol[0][v][po] += kol[bt][po][u];
            kol[1][v][po] += kol[bt ^ 1][po][u];
        }
    }
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

    cin >> n;

    for (int i = 0; i < n; i++)
        cin >> vl[i];

    for (int i = 1; i < n; i++){
        int x, y; cin >> x >> y;
        x--; y--;
        g[x].PB(y);
        g[y].PB(x);
    }

    dfs(0, -1);

    cout << ans;

    return 0;
}

• Subtask 1: 0 / 90