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Submission #1055710

# Submission time Handle Problem Language Result Execution time Memory
1055710 2024-08-13T04:06:23 Z juicy Wild Boar (JOI18_wild_boar) C++17
100 / 100
 3808 ms 406156 KB 
#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

using T = array<long long, 3>;

const int N = 2e3 + 5, K = 1e5 + 5;
const long long inf = 1e18;

int n, m, t, k;
int x[K];
array<T, 4> d[N][N], s[4 * K];
vector<array<int, 2>> g[N];

void opt(array<T, 4> &buc, vector<T> cands) {
  for (int i = 0; i < 4; ++i) {
    buc[i] = {inf, -1, -1};
  }
  for (auto p : cands) {
    buc[0] = min(buc[0], p);
  }
  for (auto p : cands) {
    if (p[1] != buc[0][1] && p[2] != buc[0][2]) {
      buc[1] = min(buc[1], p);
    }
  } 
  for (auto p : cands) {
    if (p[1] != buc[0][1] && p[2] != buc[1][2]) {
      buc[2] = min(buc[2], p);
    }
    if (p[1] != buc[1][1] && p[2] != buc[0][2]) {
      buc[3] = min(buc[3], p);
    }
  }
}

bool add(array<T, 4> &buc, T cands) {
  vector<T> nw;
  for (int i = 0; i < 4; ++i) {
    if (buc[i][0] != inf) {
      nw.push_back(buc[i]);
    }
  } 
  nw.push_back(cands);
  opt(buc, nw);
  for (auto x : buc) {
    if (x == cands) {
      return 1;
    }
  }
  return 0;
}

void dijkstra(int src, array<T, 4> *d) {
  for (int i = 1; i <= n; ++i) {
    for (int j = 0; j < 4; ++j) {
      d[i][j] = {inf, -1, -1};
    }
  }
  using dat = array<long long, 4>;
  priority_queue<dat, vector<dat>, greater<dat>> pq;
  for (auto [j, c] : g[src]) {
    pq.push({c, j, j, src});
  }
  while (pq.size()) {
    auto [c, u, s, t] = pq.top(); pq.pop();
    if (!add(d[u], {c, s, t})) {
      continue;
    }
    for (auto [v, w] : g[u]) {
      if (v != t) {
        pq.push({c + w, v, s, u});
      }
    }
  }
}

void pul(int id) {
  vector<T> cands;
  for (int i = 0; i < 4; ++i) {
    for (int j = 0; j < 4; ++j) {
      if (s[id * 2][i][2] != s[id * 2 + 1][j][1]) {
        cands.push_back({s[id * 2][i][0] + s[id * 2 + 1][j][0], s[id * 2][i][1], s[id * 2 + 1][j][2]});
      }
    }
  }
  opt(s[id], cands);
  vector<T>().swap(cands);
}

void bld(int id = 1, int l = 1, int r = k - 1) {
  if (l == r) {
    int u = x[l], v = x[l + 1];
    opt(s[id], {d[u][v][0], d[u][v][1], d[u][v][2], d[u][v][3]});
    return;
  }
  int md = (l + r) / 2;
  bld(id * 2, l, md);
  bld(id * 2 + 1, md + 1, r);
  pul(id);
}

void upd(int i, int id = 1, int l = 1, int r = k - 1) {
  if (l == r) {
    int u = x[l], v = x[l + 1];
    opt(s[id], {d[u][v][0], d[u][v][1], d[u][v][2], d[u][v][3]});
    return;
  }
  int md = (l + r) / 2;
  if (i <= md) {
    upd(i, id * 2, l, md);
  } else {
    upd(i, id * 2 + 1, md + 1, r);
  }
  pul(id);
}

int main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  cin >> n >> m >> t >> k;
  while (m--) {
    int a, b, c; cin >> a >> b >> c;
    g[a].push_back({b, c});
    g[b].push_back({a, c});
  }
  for (int i = 1; i <= n; ++i) {
    dijkstra(i, d[i]);
  }
  for (int i = 1; i <= k; ++i) {
    cin >> x[i];
  }
  bld();
  while (t--) {
    int p, q; cin >> p >> q;
    x[p] = q;
    if (p > 1) {
      upd(p - 1);
    }
    if (p < k) {
      upd(p);
    }
    cout << (s[1][0][0] == inf ? -1 : s[1][0][0]) << "\n";
  }
  return 0;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 0 ms 4444 KB Output is correct
18 Correct 0 ms 4444 KB Output is correct
19 Correct 0 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 0 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 1 ms 2392 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 0 ms 4444 KB Output is correct
18 Correct 0 ms 4444 KB Output is correct
19 Correct 0 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 0 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 1 ms 2392 KB Output is correct
26 Correct 2 ms 6488 KB Output is correct
27 Correct 26 ms 46176 KB Output is correct
28 Correct 25 ms 46148 KB Output is correct
29 Correct 94 ms 46420 KB Output is correct
30 Correct 81 ms 46168 KB Output is correct
31 Correct 78 ms 46228 KB Output is correct
32 Correct 77 ms 46164 KB Output is correct
33 Correct 93 ms 56656 KB Output is correct
34 Correct 101 ms 56912 KB Output is correct
35 Correct 87 ms 56404 KB Output is correct
36 Correct 89 ms 56396 KB Output is correct
37 Correct 95 ms 56656 KB Output is correct
38 Correct 99 ms 64852 KB Output is correct
39 Correct 97 ms 64596 KB Output is correct
40 Correct 99 ms 64848 KB Output is correct
41 Correct 98 ms 64884 KB Output is correct
42 Correct 92 ms 65360 KB Output is correct
43 Correct 101 ms 66148 KB Output is correct
44 Correct 99 ms 66112 KB Output is correct
45 Correct 59 ms 67920 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 0 ms 4444 KB Output is correct
18 Correct 0 ms 4444 KB Output is correct
19 Correct 0 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 0 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 1 ms 2392 KB Output is correct
26 Correct 2 ms 6488 KB Output is correct
27 Correct 26 ms 46176 KB Output is correct
28 Correct 25 ms 46148 KB Output is correct
29 Correct 94 ms 46420 KB Output is correct
30 Correct 81 ms 46168 KB Output is correct
31 Correct 78 ms 46228 KB Output is correct
32 Correct 77 ms 46164 KB Output is correct
33 Correct 93 ms 56656 KB Output is correct
34 Correct 101 ms 56912 KB Output is correct
35 Correct 87 ms 56404 KB Output is correct
36 Correct 89 ms 56396 KB Output is correct
37 Correct 95 ms 56656 KB Output is correct
38 Correct 99 ms 64852 KB Output is correct
39 Correct 97 ms 64596 KB Output is correct
40 Correct 99 ms 64848 KB Output is correct
41 Correct 98 ms 64884 KB Output is correct
42 Correct 92 ms 65360 KB Output is correct
43 Correct 101 ms 66148 KB Output is correct
44 Correct 99 ms 66112 KB Output is correct
45 Correct 59 ms 67920 KB Output is correct
46 Correct 149 ms 39764 KB Output is correct
47 Correct 1714 ms 79900 KB Output is correct
48 Correct 2240 ms 112152 KB Output is correct
49 Correct 2670 ms 142904 KB Output is correct
50 Correct 2630 ms 142884 KB Output is correct
51 Correct 2630 ms 143856 KB Output is correct
52 Correct 2791 ms 143304 KB Output is correct
53 Correct 2815 ms 143048 KB Output is correct
54 Correct 2792 ms 144168 KB Output is correct
55 Correct 2776 ms 143376 KB Output is correct
56 Correct 2934 ms 161304 KB Output is correct
57 Correct 3006 ms 181484 KB Output is correct
58 Correct 2995 ms 203536 KB Output is correct
59 Correct 3021 ms 227844 KB Output is correct
60 Correct 3128 ms 252968 KB Output is correct
61 Correct 2960 ms 280720 KB Output is correct
62 Correct 2922 ms 309968 KB Output is correct
63 Correct 2858 ms 341256 KB Output is correct
64 Correct 766 ms 403280 KB Output is correct
65 Correct 783 ms 403280 KB Output is correct

Subtask #4
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 0 ms 4444 KB Output is correct
18 Correct 0 ms 4444 KB Output is correct
19 Correct 0 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 0 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 1 ms 2392 KB Output is correct
26 Correct 2 ms 6488 KB Output is correct
27 Correct 26 ms 46176 KB Output is correct
28 Correct 25 ms 46148 KB Output is correct
29 Correct 94 ms 46420 KB Output is correct
30 Correct 81 ms 46168 KB Output is correct
31 Correct 78 ms 46228 KB Output is correct
32 Correct 77 ms 46164 KB Output is correct
33 Correct 93 ms 56656 KB Output is correct
34 Correct 101 ms 56912 KB Output is correct
35 Correct 87 ms 56404 KB Output is correct
36 Correct 89 ms 56396 KB Output is correct
37 Correct 95 ms 56656 KB Output is correct
38 Correct 99 ms 64852 KB Output is correct
39 Correct 97 ms 64596 KB Output is correct
40 Correct 99 ms 64848 KB Output is correct
41 Correct 98 ms 64884 KB Output is correct
42 Correct 92 ms 65360 KB Output is correct
43 Correct 101 ms 66148 KB Output is correct
44 Correct 99 ms 66112 KB Output is correct
45 Correct 59 ms 67920 KB Output is correct
46 Correct 149 ms 39764 KB Output is correct
47 Correct 1714 ms 79900 KB Output is correct
48 Correct 2240 ms 112152 KB Output is correct
49 Correct 2670 ms 142904 KB Output is correct
50 Correct 2630 ms 142884 KB Output is correct
51 Correct 2630 ms 143856 KB Output is correct
52 Correct 2791 ms 143304 KB Output is correct
53 Correct 2815 ms 143048 KB Output is correct
54 Correct 2792 ms 144168 KB Output is correct
55 Correct 2776 ms 143376 KB Output is correct
56 Correct 2934 ms 161304 KB Output is correct
57 Correct 3006 ms 181484 KB Output is correct
58 Correct 2995 ms 203536 KB Output is correct
59 Correct 3021 ms 227844 KB Output is correct
60 Correct 3128 ms 252968 KB Output is correct
61 Correct 2960 ms 280720 KB Output is correct
62 Correct 2922 ms 309968 KB Output is correct
63 Correct 2858 ms 341256 KB Output is correct
64 Correct 766 ms 403280 KB Output is correct
65 Correct 783 ms 403280 KB Output is correct
66 Correct 37 ms 32048 KB Output is correct
67 Correct 257 ms 118568 KB Output is correct
68 Correct 552 ms 377940 KB Output is correct
69 Correct 693 ms 378960 KB Output is correct
70 Correct 775 ms 404560 KB Output is correct
71 Correct 2604 ms 82056 KB Output is correct
72 Correct 3183 ms 114316 KB Output is correct
73 Correct 3497 ms 145808 KB Output is correct
74 Correct 3621 ms 145720 KB Output is correct
75 Correct 3526 ms 144740 KB Output is correct
76 Correct 3473 ms 145244 KB Output is correct
77 Correct 3591 ms 145368 KB Output is correct
78 Correct 3444 ms 145180 KB Output is correct
79 Correct 3709 ms 183976 KB Output is correct
80 Correct 3808 ms 206200 KB Output is correct
81 Correct 3613 ms 229272 KB Output is correct
82 Correct 3713 ms 255668 KB Output is correct
83 Correct 3615 ms 282552 KB Output is correct
84 Correct 3474 ms 343920 KB Output is correct
85 Correct 1608 ms 406156 KB Output is correct