제출 #982733

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
982733		vjudge1	Chase (CEOI17_chase)	C++17	0 / 100	4014 ms	7248 KiB

chase

#include <bits/stdc++.h>
#define int long long

using namespace std;

int n, v, res = 0, x, y;
bool flag;
vector<int> a;
vector<vector<int>> graph;

void dfs(int i, int j, int p, int sum, int sus, int len) {
    if(len > v) return;
    sum += a[i];
    //sus += a[i];
    for(int k : graph[i]) {
        if(k != p) sum += a[k];
    }
    //if(flag) cout << i << " " << j << " " << p << " " << sum << " " << sus << " " << len << "\n";
    if(i == j) {
        //if(flag) cout << sum - sus << "\n";
        res = max(res, sum - sus);
        return;
    }
    for(int k : graph[i]) {
        if(k != p) dfs(k, j, i, sum - a[k], sus, len + 1);
    }
}

signed main() {
    cin >> n >> v;
    a = vector<int>(n), graph = vector<vector<int>>(n);
    for(int i = 0; i < n; i++) cin >> a[i];
    for(int i = 0; i < n - 1; i++) {
        cin >> x >> y;
        x--, y--;
        graph[x].push_back(y);
        graph[y].push_back(x);
    }
    //
    for(int i = 0; i < n; i++) {
        for(int j = i + 1; j < n; j++) {
            dfs(i, j, -1, 0, a[i], 1);
        }
    }
    //
    cout << res << "\n";
}

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