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답안 #882956

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
882956 2023-12-04T09:03:21 Z MilosMilutinovic Wild Boar (JOI18_wild_boar) C++14
12 / 100
 418 ms 107588 KB 
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m, t, l;
  cin >> n >> m >> t >> l;
  vector<vector<pair<int, int>>> g(n);
  for (int i = 0; i < m; i++) {
    int x, y, z;
    cin >> x >> y >> z;
    --x; --y;
    g[x].emplace_back(y, z);
    g[y].emplace_back(x, z);
  }
  vector<int> seq(l);
  for (int i = 0; i < l; i++) {
    cin >> seq[i];
    --seq[i];
  }
  vector<int> deg(n);
  for (int i = 0; i < n; i++) {
    deg[i] = (int) g[i].size();
  }
  vector<vector<int>> idx(n, vector<int>(n));
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < deg[i]; j++) {
      idx[i][g[i][j].first] = j;
    }
  }
  const long long inf = (long long) 1e18;
  vector<vector<vector<vector<long long>>>> dist(n, vector<vector<vector<long long>>>(n));
  for (int i = 0; i < n; i++) {
    for (int j = i + 1; j < n; j++) {
      if (i == j) {
        continue;
      }
      dist[i][j].resize(deg[i]);
      for (int k = 0; k < deg[i]; k++) {
        dist[i][j][k] = vector<long long>(deg[j], inf);
      }
    }
  }
  vector<vector<long long>> d(n);
  for (int i = 0; i < n; i++) {
    d[i].resize(deg[i]);
  }
  vector<int> ia(n), ib(n);
  set<tuple<long long, int, int>> que;
  for (int ver = 0; ver < n; ver++) {
    for (int e = 0; e < deg[ver]; e++) {
      for (int i = 0; i < n; i++) {
        for (int j = 0; j < deg[i]; j++) {
          d[i][j] = inf;
        }
        ia[i] = -1;
        ib[i] = -1;
      }
      int to = g[ver][e].first;
      int w = g[ver][e].second;
      d[to][idx[to][ver]] = w;
      que.clear();
      que.emplace(d[to][idx[to][ver]], to, idx[to][ver]);
      ia[to] = idx[to][ver];
      auto Update = [&](int x, int y, long long z) {
        if (ia[x] == y || ib[x] == y) {
          que.erase(que.find({d[x][y], x, y}));
        }
        d[x][y] = z;
        if (ia[x] == y) {
          return;
        }
        if (ib[x] == y) {
          if (d[x][y] < d[x][ia[x]]) {
            swap(ia[x], ib[x]);
          }
          return;
        }
        if (ia[x] == -1) {
          ia[x] = y;
          que.emplace(d[x][y], x, y);
          return;
        }
        if (ib[x] == -1) {
          if (d[x][y] < d[x][ia[x]]) {
            swap(ia[x], ib[x]);
            ia[x] = y;
          } else {
            ib[x] = y;
          }
          que.emplace(d[x][y], x, y);
          return;
        }
        if (d[x][y] >= d[x][ia[x]] && d[x][y] < d[x][ib[x]]) {
          que.erase(que.find({d[x][ib[x]], x, ib[x]}));
          ib[x] = y;
          que.emplace(d[x][y], x, y);
          return;
        }
        if (d[x][y] < d[x][ia[x]]) {
          que.erase(que.find({d[x][ib[x]], x, ib[x]}));
          swap(ia[x], ib[x]);
          ia[x] = y;
          que.emplace(d[x][y], x, y);
        }
      };
      while (!que.empty()) {
        auto it = que.begin();
        int v = get<1>(*it);
        int lst = get<2>(*it);
        que.erase(it);
        for (int i = 0; i < deg[v]; i++) {
          if (i == lst) {
            continue;
          }
          int to = g[v][i].first;
          int w = g[v][i].second;
          if (d[to][idx[to][v]] > d[v][lst] + w) {
            Update(to, idx[to][v], d[v][lst] + w);
            assert((int) que.size() <= 2 * n);
          }
        }
      }
      for (int i = ver + 1; i < n; i++) {
        if (i == ver) {
          continue;
        }
        for (int j = 0; j < deg[i]; j++) {
          dist[ver][i][e][j] = d[i][j];
        }
      }
    }
  }
  vector<vector<vector<vector<int>>>> good(n, vector<vector<vector<int>>>(n, vector<vector<int>>(2)));
  vector<vector<int>> cc(n, vector<int>(2));
  for (int from = 0; from < n; from++) {
    for (int to = 0; to < n; to++) {
      if (from == to) {
        continue;
      }
      vector<pair<int, int>> order;
      for (int i = 0; i < deg[from]; i++) {
        for (int j = 0; j < deg[to]; j++) {
          order.emplace_back(i, j);
        }
      }
      if (from <= to) {
        sort(order.begin(), order.end(), [&](pair<int, int> a, pair<int, int> b) {
          return dist[from][to][a.first][a.second] < dist[from][to][b.first][b.second];
        });
      } else {
        sort(order.begin(), order.end(), [&](pair<int, int> a, pair<int, int> b) {
          return dist[to][from][a.second][a.first] < dist[to][from][b.second][b.first];
        });
      }
      int total = 0;
      for (auto& p : order) {
        if (cc[p.first][0] >= 2 || cc[p.second][1] >= 2) {
          continue;
        }
        good[from][to][0].push_back(p.first);
        good[from][to][1].push_back(p.second);
        cc[p.first][0] += 1;
        cc[p.second][1] += 1;
        total += 1;
        if (total >= 5) {
          break;
        }
      }
      for (int i = 0; i < deg[from]; i++) {
        cc[i][0] = 0;
      }
      for (int i = 0; i < deg[to]; i++) {
        cc[i][1] = 0;
      }
    }
  }
  vector<vector<int>> f(l);
  for (int i = 0; i < l; i++) {
    if (i > 0) {
      for (int j : good[seq[i - 1]][seq[i]][1]) {
        f[i].push_back(j);
      }
    }
    if (i + 1 < l) {
      for (int j : good[seq[i]][seq[i + 1]][0]) {
        f[i].push_back(j);
      }
    }
    sort(f[i].begin(), f[i].end());
    f[i].erase(unique(f[i].begin(), f[i].end()), f[i].end());
  }
  auto Update = [&](int i) {
    f[i].clear();
    if (i > 0) {
      for (int j : good[seq[i - 1]][seq[i]][1]) {
        f[i].push_back(j);
      }
    }
    if (i + 1 < l) {
      for (int j : good[seq[i]][seq[i + 1]][0]) {
        f[i].push_back(j);
      }
    }
    sort(f[i].begin(), f[i].end());
    f[i].erase(unique(f[i].begin(), f[i].end()), f[i].end());
  };
  vector<vector<vector<long long>>> st(4 * l);
  auto Pull = [&](int x) {
    st[x].clear();
    for (int ll = 0; ll < (int) st[x * 2].size(); ll++) {
      for (int lr = 0; lr < (int) st[x * 2][ll].size(); lr++) {
        if (st[x].empty()) {
          st[x].resize((int) st[x * 2].size());
        }
        for (int rl = 0; rl < (int) st[x * 2 + 1].size(); rl++) {
          if (st[x][ll].empty()) {
            st[x][ll] = vector<long long>((int) st[x * 2 + 1][rl].size(), inf);
          }
          if (lr == rl) {
            continue;
          }
          for (int rr = 0; rr < (int) st[x * 2 + 1][rl].size(); rr++) {
            st[x][ll][rr] = min(st[x][ll][rr], st[x * 2][ll][lr] + st[x * 2 + 1][rl][rr]);
          }
        }
      }
    }
  };
  function<void(int, int, int)> Build = [&](int x, int l, int r) {
    if (l == r) {
      st[x].resize(f[l].size());
      for (int i = 0; i < f[l].size(); i++) {
        st[x][i] = vector<long long>(f[l + 1].size(), inf);
      }
      for (int i = 0; i < f[l].size(); i++) {
        for (int j = 0; j < f[l + 1].size(); j++) {
          if (seq[l] <= seq[l + 1]) {
            st[x][i][j] = min(st[x][i][j], dist[seq[l]][seq[l + 1]][f[l][i]][f[l + 1][j]]);
          } else {
            st[x][i][j] = min(st[x][i][j], dist[seq[l + 1]][seq[l]][f[l + 1][j]][f[l][i]]);
          }
        }
      }
      return;
    }
    int mid = l + r >> 1;
    Build(x * 2, l, mid);
    Build(x * 2 + 1, mid + 1, r);
    Pull(x);
  };
  function<void(int, int, int, int)> Modify = [&](int x, int l, int r, int p) {
    if (l == r) {
      st[x].clear();
      st[x].resize(f[l].size());
      for (int i = 0; i < f[l].size(); i++) {
        st[x][i] = vector<long long>(f[l + 1].size(), inf);
      }
      for (int i = 0; i < f[l].size(); i++) {
        for (int j = 0; j < f[l + 1].size(); j++) {
          if (seq[l] <= seq[l + 1]) {
            st[x][i][j] = min(st[x][i][j], dist[seq[l]][seq[l + 1]][f[l][i]][f[l + 1][j]]);
          } else {
            st[x][i][j] = min(st[x][i][j], dist[seq[l + 1]][seq[l]][f[l + 1][j]][f[l][i]]);
          }
        }
      }
      return;
    }
    int mid = l + r >> 1;
    if (p <= mid) {
      Modify(x * 2, l, mid, p);
    } else {
      Modify(x * 2 + 1, mid + 1, r, p);
    }
    Pull(x);
  };
  for (int i = 0; i < l; i++) {
    Update(i);
  }
  Build(1, 0, l - 2);
  auto Solve = [&]() {
    long long res = inf;
    for (int i = 0; i < st[1].size(); i++) {
      for (int j = 0; j < st[1][i].size(); j++) {
        res = min(res, st[1][i][j]);
      }
    }
    return (res == inf ? -1LL : res);
  };
  while (t--) {
    int p, x;
    cin >> p >> x;
    --p; --x;
    seq[p] = x;
    Update(p);
    if (p > 0) {
      Update(p - 1);
    }
    if (p + 1 < l) {
      Update(p + 1);
    }
    if (p <= l - 2) {
      Modify(1, 0, l - 2, p);
    }
    if (p + 1 <= l - 2) {
      Modify(1, 0, l - 2, p + 1);
    }
    if (p > 0) {
      Modify(1, 0, l - 2, p - 1);
    }
    cout << Solve() << '\n';
  }
  return 0;
}

Compilation message

wild_boar.cpp: In lambda function:
wild_boar.cpp:235:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  235 |       for (int i = 0; i < f[l].size(); i++) {
      |                       ~~^~~~~~~~~~~~~
wild_boar.cpp:238:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  238 |       for (int i = 0; i < f[l].size(); i++) {
      |                       ~~^~~~~~~~~~~~~
wild_boar.cpp:239:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  239 |         for (int j = 0; j < f[l + 1].size(); j++) {
      |                         ~~^~~~~~~~~~~~~~~~~
wild_boar.cpp:249:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  249 |     int mid = l + r >> 1;
      |               ~~^~~
wild_boar.cpp: In lambda function:
wild_boar.cpp:258:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  258 |       for (int i = 0; i < f[l].size(); i++) {
      |                       ~~^~~~~~~~~~~~~
wild_boar.cpp:261:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  261 |       for (int i = 0; i < f[l].size(); i++) {
      |                       ~~^~~~~~~~~~~~~
wild_boar.cpp:262:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  262 |         for (int j = 0; j < f[l + 1].size(); j++) {
      |                         ~~^~~~~~~~~~~~~~~~~
wild_boar.cpp:272:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  272 |     int mid = l + r >> 1;
      |               ~~^~~
wild_boar.cpp: In lambda function:
wild_boar.cpp:286:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  286 |     for (int i = 0; i < st[1].size(); i++) {
      |                     ~~^~~~~~~~~~~~~~
wild_boar.cpp:287:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  287 |       for (int j = 0; j < st[1][i].size(); j++) {
      |                       ~~^~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 452 KB Output is correct
6 Correct 0 ms 460 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct

Subtask #2
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 452 KB Output is correct
6 Correct 0 ms 460 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 128 ms 41140 KB Output is correct
28 Correct 121 ms 41300 KB Output is correct
29 Correct 301 ms 80900 KB Output is correct
30 Correct 418 ms 107588 KB Output is correct
31 Correct 363 ms 97180 KB Output is correct
32 Incorrect 337 ms 98376 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 452 KB Output is correct
6 Correct 0 ms 460 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 128 ms 41140 KB Output is correct
28 Correct 121 ms 41300 KB Output is correct
29 Correct 301 ms 80900 KB Output is correct
30 Correct 418 ms 107588 KB Output is correct
31 Correct 363 ms 97180 KB Output is correct
32 Incorrect 337 ms 98376 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 452 KB Output is correct
6 Correct 0 ms 460 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 128 ms 41140 KB Output is correct
28 Correct 121 ms 41300 KB Output is correct
29 Correct 301 ms 80900 KB Output is correct
30 Correct 418 ms 107588 KB Output is correct
31 Correct 363 ms 97180 KB Output is correct
32 Incorrect 337 ms 98376 KB Output isn't correct
33 Halted 0 ms 0 KB -