Submission #1266393

#	Time	Username	Problem	Language	Result	Execution time	Memory
1266393		BlockOG	Crocodile's Underground City (IOI11_crocodile)	C++20	46 / 100	2096 ms	2888 KiB

crocodile

#include <bits/stdc++.h>

// mrrrow meeow :3
// go play vivid/stasis now! it's free on steam

#define fo(i, a, b) for (auto i = (a); i < (b); i++)
#define of(i, a, b) for (auto i = (b); i-- > (a);)
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define lb lower_bound
#define ub upper_bound
#define be(a) a.begin(), a.end()
using namespace std;

int ____init = [] {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    return 0;
}();

vector<pair<int, int>> adj[100000];
set<int> exits;
bool vis[100000];

int dfs(int i, int p = -1) {
    if (exits.count(i)) return 0;
    vis[i] = true;

    int resa = 1000000000;
    int resb = 1000000000;
    for (auto [j, l] : adj[i]) {
        if (vis[j]) continue;
        resb = min(resb, dfs(j, i) + l);
        if (resb < resa) swap(resa, resb);
    }

    vis[i] = false;
    return resb;
}

int travel_plan(int n, int m, int r[][2], int l[], int k, int p[]) {
    fo(i, 0, m) {
        adj[r[i][0]].pb({r[i][1], l[i]});
        adj[r[i][1]].pb({r[i][0], l[i]});
    }

    fo(i, 0, k) exits.insert(p[i]);

    return dfs(0);
}

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