Submission #561230

#	Time	Username	Problem	Language	Result	Execution time	Memory
561230		fatemetmhr	Chase (CEOI17_chase)	C++17	0 / 100	41 ms	9844 KiB

chase

#include <bits/stdc++.h>

using namespace std;

typedef long long    ll;
typedef pair<ll, ll> pll;

#define pb      push_back
#define all(x)  x.begin(), x.end()
#define fi      first
#define se      second
#define mp      make_pair

const int maxn5 = 1e5 + 10;
const int ssq   = 320;
const ll  inf   = 1e18;


ll h[maxn5], have[maxn5];
ll a[maxn5], lim, ans = 0;
vector <int> adj[maxn5];

inline void dfs(int v, int par){
    for(auto u : adj[v]) if(u != par)
        have[v] += a[u];
    have[v] += a[v];
    if(h[v] < lim)
        ans = max(ans, have[v]);
    for(auto u : adj[v]) if(u != par){
        h[u] = h[v] + 1;
        have[u] = have[v] - a[u];
        dfs(u, v);
    }
    //cout << v << ' ' << h[v] << ' ' << have[v] << endl;
    return;
}

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

    int n; cin >> n >> lim;
    for(int i = 0; i < n; i++)
        cin >> a[i];
    for(int i = 0; i < n - 1; i++){
        int a, b; cin >> a >> b;
        a--; b--;
        adj[a].pb(b);
        adj[b].pb(a);
    }

    dfs(0, -1);
    cout << ans - a[0] << endl;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 30
• Subtask 4: 0 / 30