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Submission #446987

# Submission time Handle Problem Language Result Execution time Memory
446987 2021-07-24T07:48:29 Z prvocislo Cities (BOI16_cities) C++17
0 / 100
 6000 ms 44364 KB 
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;

const ll inf = 1e18 + 5;
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, k, m;
    cin >> n >> k >> m;
    vector<int> im(k);
    for (int i = 0; i < k; i++) 
        cin >> im[i], im[i]--;
    vector<vector<pair<int, int> > > g(n);
    for (int i = 0, a, b, c; i < m; i++)
        cin >> a >> b >> c, g[--a].push_back({--b, c}), g[b].push_back({a, c});
    vector<vector<ll> > dp((1 << k), vector<ll>(n, inf));
    dp[0].assign(n, 0);
    for (int m = 1; m < (1 << k); m++)
    {
        set<pair<ll, int> > pq;
        for (int i = 0; i < n; i++)
        {
            int id = find(im.begin(), im.end(), i) - im.begin();
            if (m & (1 << id)) dp[m][i] = dp[m^(1 << id)][i];
            else for (int s = m; s; s = (s-1)&m)
                dp[m][i] = min(dp[m][i], dp[s][i] + dp[m^s][i]);
            pq.insert({dp[m][i], i});
        }
        vector<bool> vis(n, false);
        while (!pq.empty())
        {
            int d = pq.begin()->first, u = pq.begin()->second;
            pq.erase(pq.begin());
            if (vis[u]) continue;
            vis[u] = true;
            for (const pair<int, int> &i : g[u])
            {
                if (!vis[i.first] && dp[m][i.first] > d + i.second)
                {
                    pq.erase({dp[m][i.first], i.first});
                    dp[m][i.first] = d + i.second;
                    pq.insert({dp[m][i.first], i.first});
                }
            } 
        }
    }
    cout << (*min_element(dp[(1<<k)-1].begin(), dp[(1<<k)-1].end())) << "\n";
    return 0;
}

Subtask #1
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Incorrect 1 ms 204 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1603 ms 25468 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 616 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 3022 ms 31808 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Execution timed out 6077 ms 44364 KB Time limit exceeded
2 Halted 0 ms 0 KB -