9648 | 2024. 02. 23 17:04:58 | zeytonx | A lehető legkevesebb metróval utazás (40 pont) | cpp17 | Futási hiba 32/40 | 142ms | 63172 KiB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef vector<ll> vll;
typedef set<ll> sll;
typedef queue<ll> qll;
typedef priority_queue<ll> pqll;
typedef vector<vll> v2ll;
typedef map<ll,ll> mll;
typedef vector<pll> vpll;
typedef map<pll,ll> mpll;
typedef vector<vpll> v2pll;
typedef vector<sll> v2sll;
#define fs first
#define sc second
#define pb push_back
const ll MOD = 1e9+7;
void solve()
{
ll n, m, ind, erk;
cin >> n >> m >> ind >> erk;
ind--; erk--;
v2ll g(n);
v2ll st(m);
for(ll i = 0; i < n; i++)
{
ll pc;
cin >> pc;
for(ll j = 0; j < pc; j++)
{
ll in; cin >> in; in--;
st[in].pb(i);
}
}
for(ll i = 0; i < m; i++)
{
if(!st[i].empty() && st[i].size() > 1)
for(ll j = 0; j < st[i].size(); j++)
for(ll l = j+1; l < st[i].size(); l++)
{
g[st[i][j]].pb(st[i][l]);
g[st[i][l]].pb(st[i][j]);
}
}
qll q;
vll used(n, -1);
for(ll i : st[ind])
{
q.push(i);
used[i] = -2;
}
ll ans = -1;
while(!q.empty())
{
ll p = q.front();
q.pop();
if(find(st[erk].begin(), st[erk].end(), p) != st[erk].end())
{
ans = p;
break;
}
for(ll i : g[p])
{
if(used[i] == -1)
{
q.push(i);
used[i] = p;
}
}
}
if(ans == -1)
{
cout << -1 << endl;
return;
}
vll v_ans;
while(ans >= 0)
{
v_ans.pb(ans);
ans = used[ans];
}
reverse(v_ans.begin(), v_ans.end());
cout << v_ans.size() << "\n";
for(ll i : v_ans)
cout << i+1 << " ";
cout << endl;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL); cout.tie(NULL);
ll t = 1;
//cin >> t;
while(t--)
solve();
cout << endl;
return 0;
}
Részfeladat | Összpont | Teszt | Verdikt | Idő | Memória | ||
---|---|---|---|---|---|---|---|
base | 32/40 | ||||||
1 | Elfogadva | 0/0 | 3ms | 2108 KiB | |||
2 | Elfogadva | 0/0 | 6ms | 3732 KiB | |||
3 | Elfogadva | 2/2 | 3ms | 2116 KiB | |||
4 | Elfogadva | 2/2 | 3ms | 2344 KiB | |||
5 | Elfogadva | 2/2 | 3ms | 2724 KiB | |||
6 | Elfogadva | 2/2 | 2ms | 2684 KiB | |||
7 | Elfogadva | 2/2 | 3ms | 2868 KiB | |||
8 | Elfogadva | 2/2 | 3ms | 2904 KiB | |||
9 | Elfogadva | 2/2 | 4ms | 3396 KiB | |||
10 | Elfogadva | 2/2 | 4ms | 3640 KiB | |||
11 | Elfogadva | 2/2 | 3ms | 3472 KiB | |||
12 | Elfogadva | 2/2 | 6ms | 4760 KiB | |||
13 | Elfogadva | 2/2 | 6ms | 5020 KiB | |||
14 | Elfogadva | 2/2 | 4ms | 5236 KiB | |||
15 | Futási hiba | 0/2 | 140ms | 63172 KiB | |||
16 | Futási hiba | 0/2 | 136ms | 63144 KiB | |||
17 | Futási hiba | 0/2 | 142ms | 63116 KiB | |||
18 | Futási hiba | 0/2 | 138ms | 63108 KiB | |||
19 | Elfogadva | 2/2 | 4ms | 4748 KiB | |||
20 | Elfogadva | 2/2 | 4ms | 5320 KiB | |||
21 | Elfogadva | 2/2 | 4ms | 4920 KiB | |||
22 | Elfogadva | 2/2 | 6ms | 5984 KiB |