oj.uz

답안 #974138

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
974138 2024-05-02T21:41:13 Z Ooops_sorry 수확 (JOI20_harvest) C++14
100 / 100
 868 ms 227136 KB 
#include<iostream>
#include<deque>
#include<algorithm>
#include<vector>
#include<map>
#include<random>
#include<time.h>
#include<cassert>
#include<chrono>
#include<set>
#include<unordered_set>
#include<array>
 
using namespace std;
 
#define ull unsigned long long
#define pb push_back
#define ld long double
#define ll long long
#define all(a) a.begin(), a.end()
#define int long long 
 
mt19937_64 rnd(51);
 
struct SegTree {
  vector<ll> t;
  SegTree(int n) {
    t.resize(4 * n);
  }
  void update(int v, int l, int r, int pos, ll val) {
    if (l == r) {
      t[v] += val;
      return;
    }
    int m = (l + r) / 2;
    if (pos <= m) {
      update(2 * v, l, m, pos, val);
    } else {
      update(2 * v + 1, m + 1, r, pos, val);
    }
    t[v] = t[v * 2] + t[v * 2 + 1];
  }
  ll get(int v, int tl, int tr, int l, int r) {
    if (l > r) return 0;
    if (tl == l && tr == r) {
      return t[v];
    }
    int tm = (tl + tr) / 2;
    return get(2 * v, tl, tm, l, min(r, tm)) + get(2 * v + 1, tm + 1, tr, max(l, tm + 1), r);
  }
};
 
const int N = 2e5 + 10;
vector<int> mas[N];
 
vector<pair<int, int>> g[N];
bool on_cycle[N];
pair<int, int> go[N];
 
ll ans[N];
ll dep[N], sz[N];
vector<pair<ll, int>> query[N];

SegTree Tree(N);
vector<ll> dif;
 
void zhfs(int v) {
  for (auto i : mas[v]) {
    dif.pb(i + dep[v]);
  }
  sz[v] = mas[v].size();
  for (auto [u, c] : g[v]) {
    if (!on_cycle[u]) {
      dep[u] = dep[v] + c;
      zhfs(u);
      sz[v] += sz[u];
    }
  }
}
 
vector<ll> st[N];

void dfs(int v) {
  int best = -1;
  for (auto [u, c] : g[v]) {
    if (!on_cycle[u]) {
      if (best == -1 || sz[u] > sz[best]) {
        best = u;
      }
    }
  }
  for (auto [u, c] : g[v]) {
    if (!on_cycle[u] && best != u) {
      dfs(u);
      for (auto i : st[u]) {
        int j = lower_bound(all(dif), i) - dif.begin();
        Tree.update(1, 0, N - 1, j, -1);
      }
    }
  }
  if (best != -1) {
    dfs(best);
    swap(st[v], st[best]);
  }
  for (auto i : mas[v]) {
    int j = lower_bound(all(dif), i + dep[v]) - dif.begin();
    Tree.update(1, 0, N - 1, j, 1);
    st[v].pb(i + dep[v]);
  }
  for (auto [u, c] : g[v]) {
    if (!on_cycle[u]) {
      for (int i : st[u]) {
        st[v].pb(i);
        int j = lower_bound(all(dif), i) - dif.begin();
        Tree.update(1, 0, N - 1, j, 1);
      }
    }
  }
  if (!on_cycle[v]) {
    for (auto [t, i] : query[v]) {
      int j = upper_bound(all(dif), t + dep[v]) - dif.begin() - 1;
      ans[i] += Tree.get(1, 0, N - 1, 0, j);
    }
  }
}
 
signed main() {
#ifdef LOCAL
  freopen("input.txt", "r", stdin);
#endif // LOCAL
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n, m, l, c;
  cin >> n >> m >> l >> c;
  int left = (c / l) * l;
  c %= l;
  vector<int> a(n), b(m);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  for (int i = 0; i < m; i++) {
    cin >> b[i];
  }
  int q;
  cin >> q;
  for (int i = 0; i < q; i++) {
    int v;
    ll t;
    cin >> v >> t;
    v--;
    query[v].pb({t, i});
  }
  int j = 0;
  while (j < b.size() && b[j] < a[0]) {
    mas[n - 1].pb(b[j] + l - a[n - 1]);
    j++;
  }
  for (int i = 0; i < n; i++) {
    while (j < b.size() && (i == n - 1 || a[i + 1] > b[j])) {
      mas[i].pb(b[j] - a[i]);
      j++;
    }
  } 
  assert(j == b.size());
  for (int i = 0; i < n; i++) {
    a.pb(a[i] + l);
  }
  j = 0;
  for (int i = n; i < 2 * n; i++) {
    while (j + 1 < 2 * n && a[i] - a[j + 1] >= c) {
      j++;
    } 
    go[i % n] = {j % n, a[i] - a[j] + left};
    g[j % n].pb({i % n, a[i] - a[j] + left});
  }
  vector<bool> used(n);
  vector<deque<int>> cycles;
  for (int i = 0; i < n; i++) {
    if (!used[i]) {
      int j = i;
      map<int, int> here;
      deque<int> arr;
      while (!used[j]) {
        used[j] = 1;
        here[j] = 1;
        arr.pb(j);
        j = go[j].first;
      }
      if (here[j]) {
        while (arr.front() != j) {
          arr.pop_front();
        }
        cycles.pb(arr);
        for (int v : arr) {
          on_cycle[v] = 1;
        }
      }
    }
  }
  for (int i = 0; i < n; i++) {
    if (on_cycle[i]) {
      dif.clear();
      zhfs(i);
      sort(all(dif));
      dif.erase(unique(all(dif)), dif.end());
      dfs(i);
      for (int val : st[i]) {
        int j = lower_bound(all(dif), val) - dif.begin();
        Tree.update(1, 0, N - 1, j, -1);
      }
    }
  }
  for (auto cycle : cycles) {
    int sz = cycle.size();
    vector<ll> pr(sz + 1);
    for (int i = 0; i < sz; i++) {
      int u = cycle[i], v = cycle[(i + 1) % sz];
      pr[i + 1] = pr[i] + go[u].second;
    }
    vector<ll> u, rem;
    map<ll, vector<pair<int, int>>> mp;
    for (int i = 0; i < sz; i++) {
      int v = cycle[i];
      for (auto val : st[v]) {
        u.pb(val - pr[i]);
        rem.pb((val + pr.back() - pr[i]) % pr.back());
      }
      for (auto [t, ind] : query[v]) {
        mp[t - pr[i]].pb({ind, i});
      }
    }
    sort(all(u));
    sort(all(rem));
    rem.erase(unique(all(rem)), rem.end());
    int sz2 = rem.size();
    SegTree cnt2(sz2);
    int ind = 0;
    ll sum = 0;
    for (auto [t, arr] : mp) {
      while (ind < u.size() && u[ind] <= t) {
        sum += (u[ind] + pr.back()) / pr.back();
        int k = lower_bound(all(rem), (u[ind] + pr.back()) % pr.back()) - rem.begin();
        assert(rem[k] == (u[ind] + pr.back()) % pr.back());
        cnt2.update(1, 0, sz2 - 1, k, 1);
        ind++;
      }
      for (auto [pos, i] : arr) {
        int real_t = t + pr[i];
        int pos1 = upper_bound(all(rem), (real_t % pr.back()) - pr[i]) - rem.begin() - 1;
        int pos2 = lower_bound(all(rem), pr.back() - pr[i]) - rem.begin();
        ans[pos] += ind * (real_t / pr.back()) - sum;
        ans[pos] -= cnt2.get(1, 0, sz2 - 1, pos2, sz2 - 1);
        ans[pos] += cnt2.get(1, 0, sz2 - 1, 0, pos1);
        int pos3 = upper_bound(all(rem), real_t % pr.back() + pr.back() - pr[i]) - rem.begin() - 1;
        if (0 <= pos2 && pos2 <= pos3 && pos2 < sz2) {
          ans[pos] += cnt2.get(1, 0, sz2 - 1, pos2, pos3);
        }
      }
    }
    int sz1 = u.size();
    SegTree tr(sz1);
    for (int i = 0; i < sz; i++) {
      int v = cycle[i];
      for (auto val : st[v]) {
        int j = lower_bound(all(u), val - pr[i]) - u.begin();
        tr.update(1, 0, sz1 - 1, j, 1);
      }
      for (auto [t, ind] : query[v]) {
        int k = upper_bound(all(u), t - pr[i]) - u.begin() - 1;
        ans[ind] += tr.get(1, 0, sz1 - 1, 0, k);
      }
    }
  }
  for (int i = 0; i < q; i++) {
    cout << ans[i] << endl;
  }
  return 0; 
}

Compilation message

harvest.cpp: In function 'void zhfs(long long int)':
harvest.cpp:72:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   72 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp: In function 'void dfs(long long int)':
harvest.cpp:85:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   85 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp:92:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   92 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp:110:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  110 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp:120:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  120 |     for (auto [t, i] : query[v]) {
      |               ^
harvest.cpp: In function 'int main()':
harvest.cpp:154:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  154 |   while (j < b.size() && b[j] < a[0]) {
      |          ~~^~~~~~~~~~
harvest.cpp:159:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  159 |     while (j < b.size() && (i == n - 1 || a[i + 1] > b[j])) {
      |            ~~^~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from harvest.cpp:8:
harvest.cpp:164:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  164 |   assert(j == b.size());
      |          ~~^~~~~~~~~~~
harvest.cpp:217:25: warning: unused variable 'v' [-Wunused-variable]
  217 |       int u = cycle[i], v = cycle[(i + 1) % sz];
      |                         ^
harvest.cpp:228:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  228 |       for (auto [t, ind] : query[v]) {
      |                 ^
harvest.cpp:239:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  239 |     for (auto [t, arr] : mp) {
      |               ^
harvest.cpp:240:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  240 |       while (ind < u.size() && u[ind] <= t) {
      |              ~~~~^~~~~~~~~~
harvest.cpp:247:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  247 |       for (auto [pos, i] : arr) {
      |                 ^
harvest.cpp:268:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  268 |       for (auto [t, ind] : query[v]) {
      |                 ^

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 29792 KB Output is correct
2 Correct 14 ms 31672 KB Output is correct
3 Correct 15 ms 32184 KB Output is correct
4 Correct 14 ms 30044 KB Output is correct
5 Correct 13 ms 30608 KB Output is correct
6 Correct 16 ms 30556 KB Output is correct
7 Correct 14 ms 30736 KB Output is correct
8 Correct 15 ms 30044 KB Output is correct
9 Correct 14 ms 30044 KB Output is correct
10 Correct 14 ms 30044 KB Output is correct
11 Correct 14 ms 30128 KB Output is correct
12 Correct 15 ms 30556 KB Output is correct
13 Correct 17 ms 30556 KB Output is correct
14 Correct 17 ms 30300 KB Output is correct
15 Correct 14 ms 30300 KB Output is correct
16 Correct 16 ms 30524 KB Output is correct
17 Correct 14 ms 30300 KB Output is correct
18 Correct 13 ms 30372 KB Output is correct
19 Correct 14 ms 30300 KB Output is correct
20 Correct 13 ms 30300 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 502 ms 58700 KB Output is correct
2 Correct 386 ms 49276 KB Output is correct
3 Correct 465 ms 186244 KB Output is correct
4 Correct 650 ms 210316 KB Output is correct
5 Correct 395 ms 98616 KB Output is correct
6 Correct 404 ms 98440 KB Output is correct
7 Correct 354 ms 51464 KB Output is correct
8 Correct 363 ms 51640 KB Output is correct
9 Correct 685 ms 80312 KB Output is correct
10 Correct 497 ms 78756 KB Output is correct
11 Correct 812 ms 79112 KB Output is correct
12 Correct 737 ms 79232 KB Output is correct
13 Correct 800 ms 79244 KB Output is correct
14 Correct 544 ms 76964 KB Output is correct
15 Correct 571 ms 67636 KB Output is correct
16 Correct 383 ms 72504 KB Output is correct
17 Correct 425 ms 72328 KB Output is correct
18 Correct 311 ms 47640 KB Output is correct
19 Correct 305 ms 47036 KB Output is correct
20 Correct 381 ms 53304 KB Output is correct

Subtask #3
75.0 / 75.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 29792 KB Output is correct
2 Correct 14 ms 31672 KB Output is correct
3 Correct 15 ms 32184 KB Output is correct
4 Correct 14 ms 30044 KB Output is correct
5 Correct 13 ms 30608 KB Output is correct
6 Correct 16 ms 30556 KB Output is correct
7 Correct 14 ms 30736 KB Output is correct
8 Correct 15 ms 30044 KB Output is correct
9 Correct 14 ms 30044 KB Output is correct
10 Correct 14 ms 30044 KB Output is correct
11 Correct 14 ms 30128 KB Output is correct
12 Correct 15 ms 30556 KB Output is correct
13 Correct 17 ms 30556 KB Output is correct
14 Correct 17 ms 30300 KB Output is correct
15 Correct 14 ms 30300 KB Output is correct
16 Correct 16 ms 30524 KB Output is correct
17 Correct 14 ms 30300 KB Output is correct
18 Correct 13 ms 30372 KB Output is correct
19 Correct 14 ms 30300 KB Output is correct
20 Correct 13 ms 30300 KB Output is correct
21 Correct 502 ms 58700 KB Output is correct
22 Correct 386 ms 49276 KB Output is correct
23 Correct 465 ms 186244 KB Output is correct
24 Correct 650 ms 210316 KB Output is correct
25 Correct 395 ms 98616 KB Output is correct
26 Correct 404 ms 98440 KB Output is correct
27 Correct 354 ms 51464 KB Output is correct
28 Correct 363 ms 51640 KB Output is correct
29 Correct 685 ms 80312 KB Output is correct
30 Correct 497 ms 78756 KB Output is correct
31 Correct 812 ms 79112 KB Output is correct
32 Correct 737 ms 79232 KB Output is correct
33 Correct 800 ms 79244 KB Output is correct
34 Correct 544 ms 76964 KB Output is correct
35 Correct 571 ms 67636 KB Output is correct
36 Correct 383 ms 72504 KB Output is correct
37 Correct 425 ms 72328 KB Output is correct
38 Correct 311 ms 47640 KB Output is correct
39 Correct 305 ms 47036 KB Output is correct
40 Correct 381 ms 53304 KB Output is correct
41 Correct 675 ms 82408 KB Output is correct
42 Correct 645 ms 195068 KB Output is correct
43 Correct 635 ms 204880 KB Output is correct
44 Correct 791 ms 227136 KB Output is correct
45 Correct 535 ms 112056 KB Output is correct
46 Correct 529 ms 118328 KB Output is correct
47 Correct 516 ms 118888 KB Output is correct
48 Correct 492 ms 118020 KB Output is correct
49 Correct 505 ms 118300 KB Output is correct
50 Correct 539 ms 84020 KB Output is correct
51 Correct 556 ms 83848 KB Output is correct
52 Correct 834 ms 106236 KB Output is correct
53 Correct 868 ms 105124 KB Output is correct
54 Correct 817 ms 106344 KB Output is correct
55 Correct 697 ms 106180 KB Output is correct
56 Correct 621 ms 99988 KB Output is correct
57 Correct 590 ms 102172 KB Output is correct
58 Correct 593 ms 101432 KB Output is correct
59 Correct 510 ms 98868 KB Output is correct
60 Correct 530 ms 99236 KB Output is correct
61 Correct 551 ms 98616 KB Output is correct
62 Correct 753 ms 87616 KB Output is correct
63 Correct 435 ms 73152 KB Output is correct
64 Correct 450 ms 73096 KB Output is correct
65 Correct 478 ms 73924 KB Output is correct
66 Correct 428 ms 73212 KB Output is correct
67 Correct 419 ms 73636 KB Output is correct
68 Correct 422 ms 72044 KB Output is correct
69 Correct 622 ms 86404 KB Output is correct
70 Correct 618 ms 83396 KB Output is correct
71 Correct 634 ms 84532 KB Output is correct
72 Correct 641 ms 86328 KB Output is correct