Submission #997935

#	Time	Username	Problem	Language	Result	Execution time	Memory
997935		overwatch9	Crocodile's Underground City (IOI11_crocodile)	C++17	46 / 100	2 ms	4700 KiB

crocodile

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
vector <vector <pair <int, int>>> adj;
vector <bool> is_exit;
ll dfs(int s, int p) {
    if (adj[s].size() == 1 && s != p)
        return 0;
    vector <ll> x;
    for (auto i : adj[s]) {
        if (i.first == p)
            continue;
        x.push_back(dfs(i.first, s) + i.second);
    }
    sort(x.begin(), x.end());
    return x[1];
}
int travel_plan(int N, int M, int R[][2], int W[], int K, int P[]) {
    adj.resize(N+1);
    is_exit = vector <bool> (N+1);
    for (int i = 0; i < M; i++) {
        int a = R[i][0], b = R[i][1];
        int w = W[i];
        adj[a].push_back({b, w});
        adj[b].push_back({a, w});
    }
    for (int i = 0; i < K; i++)
        is_exit[P[i]] = true;
    if (M > N-1)
        return 0;
    return dfs(0, 0);
}

• Subtask 1: 46 / 46
• Subtask 2: 0 / 43
• Subtask 3: 0 / 11