Submission #336186

#	Time	Username	Problem	Language	Result	Execution time	Memory
336186		wiwiho	Sjekira (COCI20_sjekira)	C++14	110 / 110	71 ms	9964 KiB

sjekira

#include<bits/stdc++.h>

#define iter(a) a.begin(), a.end()
#define pll pair<ll, ll>
#define pii pair<int, int>
#define mp make_pair
#define F first
#define S second
#define lsort(a) sort(iter(a))
#define eb emplace_back
#define gsort(a) sort(iter(a), greater<>());

using namespace std;

typedef long long ll;

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

    int n;
    cin >> n;

    vector<pll> a(n);
    for(int i = 1; i <= n; i++) cin >> a[i-1].F, a[i-1].S = i;
    gsort(a);

    vector<vector<int>> g(n + 1);
    vector<int> deg(n + 1);
    for(int i = 1; i < n; i++){
        int u, v;
        cin >> u >> v;
        g[u].eb(v);
        g[v].eb(u);
        deg[u]++; deg[v]++;
    }

    ll ans = 0;
    for(int i = 0; i < n; i++){
        ans += a[i].F * deg[a[i].S];
        if(i) ans += a[i].F;
        for(int j : g[a[i].S]) deg[j]--;
    }

    cout << ans << "\n";

    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 30 / 30
• Subtask 4: 60 / 60