oj.uz

Submission #701722

# Submission time Handle Problem Language Result Execution time Memory
701722 2023-02-22T02:41:41 Z scottchou Deblo (COCI18_deblo) C++17
63 / 90
 46 ms 6544 KB 
#include<bits/stdc++.h>
using namespace std;
int const N = 1e5 + 5;
typedef long long LL;
int a[N];
vector<int> graph[N];
int val[N];
void dfs(int x, int d = 0, int fa = -1){
    d = d ^ a[x];
    val[x] = d;
    for(auto i : graph[x]){
        if(i == fa) 
            continue;
        dfs(i, d, x);
    }
}
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    int u, v;
    LL sum = 0;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        sum += a[i];
    }
    for(int i = 0; i < n - 1; i++){
        cin >> u >> v;
        graph[u].push_back(v);
        graph[v].push_back(u);        
    }
    if(n <= 1000){
        LL ans = 0;
        for(int i = 1; i <= n; i++){
            dfs(i);
            for(int j = 1; j <= n; j++){
                if(i != j)
                    ans += val[j];
            }
        }
        cout << ans / 2 + sum << '\n';
    }else{
        LL ans = 0;
        for(int i = 0; i <= 22; i++){
            LL zro = 0, on = 0;
            for(int j = 1; j <= n; j++){
                if(a[j] & (1 << i)){
                    swap(zro, on);
                    on++;
                }else{
                    zro++;
                }
                ans += on * (1 << i);
            }
        }
        cout << ans << '\n';
    }
}

Subtask #1
63.0 / 90.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 14 ms 2732 KB Output is correct
5 Correct 15 ms 2728 KB Output is correct
6 Correct 43 ms 6360 KB Output is correct
7 Correct 41 ms 6396 KB Output is correct
8 Incorrect 44 ms 6472 KB Output isn't correct
9 Incorrect 42 ms 6344 KB Output isn't correct
10 Incorrect 46 ms 6544 KB Output isn't correct