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Submission #670828

# Submission time Handle Problem Language Result Execution time Memory
670828 2022-12-10T18:45:45 Z dattranxxx Relay Marathon (NOI20_relaymarathon) C++11
25 / 100
 1344 ms 133852 KB 
#include<bits/stdc++.h>
using namespace std;
using ll = long long;

#define int ll

const int N = 1e5 + 5, inf = 1e16;
vector<pair<int, int>> adj[N];
int special[N];
int n, m, k;

priority_queue<pair<int, int>> q;
int dis[N], src[N];

int dijkstra(int s, int t) {
  memset(dis, 0x3f, sizeof(dis));
  q.emplace(0, s); dis[s] = 0;
  while (!q.empty()) {
    int d, u; tie(d, u) = q.top(); q.pop();
    if (-d != dis[u]) continue;
    if (special[u] && u != s && u != t) return dis[u];
    for (auto& p : adj[u]) {
      int v, w; tie(v, w) = p;
      if (dis[u] + w < dis[v]) 
        dis[v] = dis[u] + w, q.emplace(-dis[v], v);
    }
  }
  return inf;
}

tuple<int, int, int> dijkstra0(int x = -1, int y = -1) {
  memset(dis, 0x3f, sizeof(dis));
  for (int v = 0; v < n; ++v) if (special[v] && v != x && v != y)
    dis[v] = 0, src[v] = v, q.emplace(0, v);
  while (!q.empty()) {
    int d, u; tie(d, u) = q.top(); q.pop();
    if (-d != dis[u]) continue;
    for (auto& p : adj[u]) {
      int v, w; tie(v, w) = p;
      if (dis[u] + w < dis[v]) 
        dis[v] = dis[u] + w, src[v] = src[u], q.emplace(-dis[v], v);
    }
  }
  int res = inf, s = -1, t = -1;
  for (int u = 0; u < n; ++u) for (auto& p : adj[u]) {
    int v, w; tie(v, w) = p;
    if (src[u] != src[v] && dis[u] + dis[v] + w < res)
      res = dis[u] + dis[v] + w, s = src[u], t = src[v];
  }
  return make_tuple(res, s, t);
}

signed main() {
  cin.tie(0)->sync_with_stdio(0); cout.tie(0);
  cin >> n >> m >> k;
  for (int i = 0, u, v, w; i < m; ++i)
    cin >> u >> v >> w, u--, v--,
    adj[u].emplace_back(v, w),
    adj[v].emplace_back(u, w);
    
  for (int i = 0, v; i < k; ++i)
    cin >> v, v--, special[v] = 1;
  
    
  int val1, val2, s, t, tmp1, tmp2;
  tie(val1, s, t) = dijkstra0(); tie(val2, tmp1, tmp2) = dijkstra0(s, t);
  cout << min(val1 + val2, dijkstra(s, t) + dijkstra(t, s));
	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 3412 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 3412 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 52 ms 8300 KB Output is correct
2 Correct 6 ms 4180 KB Output is correct
3 Correct 1211 ms 120212 KB Output is correct
4 Correct 549 ms 59360 KB Output is correct
5 Correct 155 ms 14276 KB Output is correct
6 Correct 126 ms 12136 KB Output is correct
7 Correct 181 ms 15560 KB Output is correct
8 Correct 57 ms 8312 KB Output is correct
9 Correct 116 ms 11336 KB Output is correct
10 Correct 81 ms 9408 KB Output is correct
11 Correct 1210 ms 127020 KB Output is correct
12 Correct 85 ms 9808 KB Output is correct
13 Correct 346 ms 36204 KB Output is correct
14 Correct 190 ms 16212 KB Output is correct
15 Correct 1232 ms 124780 KB Output is correct
16 Correct 39 ms 7636 KB Output is correct
17 Correct 857 ms 93164 KB Output is correct
18 Correct 6 ms 4436 KB Output is correct
19 Correct 1344 ms 133852 KB Output is correct
20 Correct 168 ms 15352 KB Output is correct
21 Correct 137 ms 13628 KB Output is correct
22 Correct 78 ms 9264 KB Output is correct
23 Correct 19 ms 6860 KB Output is correct
24 Correct 842 ms 102728 KB Output is correct
25 Correct 119 ms 11500 KB Output is correct
26 Correct 55 ms 8288 KB Output is correct
27 Correct 107 ms 10432 KB Output is correct
28 Correct 14 ms 5460 KB Output is correct
29 Correct 189 ms 15228 KB Output is correct
30 Correct 316 ms 29176 KB Output is correct

Subtask #4
0 / 58.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 3412 KB Output isn't correct
2 Halted 0 ms 0 KB -