oj.uz

답안 #974131

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
974131 2024-05-02T21:12:37 Z Ooops_sorry 수확 (JOI20_harvest) C++14
5 / 100
 5000 ms 201436 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];
 
void zhfs(int v) {
  sz[v] = mas[v].size();
  for (auto [u, c] : g[v]) {
    if (!on_cycle[u]) {
      dep[u] = dep[v] + c;
      sz[v] += sz[u];
      zhfs(u);
    }
  }
}
 
vector<ll> st[N];
 
void dfs(int v) {
  for (auto i : mas[v]) {
    st[v].pb(i + dep[v]);
  }
  for (auto [u, c] : g[v]) {
    if (!on_cycle[u]) {
      dfs(u);
      if (st[u].size() > st[v].size()) {
        swap(st[u], st[v]);
      }
    }
  }
  for (auto [u, c] : g[v]) {
    if (!on_cycle[u]) {
      for (int i : st[u]) {
        st[v].pb(i);
      }
    }
  }
  if (!on_cycle[v]) {
    for (auto [t, i] : query[v]) {
      for (auto val : st[v]) {
        if (val - dep[v] <= t) {
          ans[i]++;
        }
      }
    }
  }
}
 
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]) {
      zhfs(i);
      dfs(i);
    }
  }
  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 pos2 = upper_bound(all(rem), (real_t % pr.back()) - pr[i]) - rem.begin() - 1;
        int pos3 = lower_bound(all(rem), pr.back() - pr[i]) - rem.begin();
        for (int j = pos3; j < sz2; j++) {
          assert(rem[j] >= pr.back() - pr[i]);
        }
        ans[pos] += ind * (real_t / pr.back()) - sum;
        ans[pos] -= cnt2.get(1, 0, sz2 - 1, pos3, sz2 - 1);
        ans[pos] += cnt2.get(1, 0, sz2 - 1, 0, pos2);
        int pos4 = upper_bound(all(rem), real_t % pr.back() + pr.back() - pr[i]) - rem.begin() - 1;
        if (0 <= pos3 && pos3 <= pos4 && pos4 < sz2) {
          ans[pos] += cnt2.get(1, 0, sz2 - 1, pos3, pos4);
          
        }
      }
    }
    for (int i = 0; i < sz; i++) {
      int v = cycle[i];
      for (auto [t, ind] : query[v]) {
        for (int j = 0; j < sz; j++) {
          for (auto val : st[cycle[j]]) {
            if (val - pr[j] <= t - pr[i]) {
              //ans[ind] += t / pr.back() - (val - pr[j] + pr.back()) / pr.back();
              if (j <= i) {
                ans[ind]++;
              }
              /*
              if (pr.back() - pr[i] <= (val - pr[j] + pr.back()) % pr.back()) {
                ans[ind]--;
              }
              if ((val + pr[i] - pr[j] + pr.back()) % pr.back() <= t % pr.back()) {
                ans[ind]++;
              }*/
            }
          }
        } 
      }
    }
  }
  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:66:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   66 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp: In function 'void dfs(long long int)':
harvest.cpp:81:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   81 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp:89:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   89 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp:97:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   97 |     for (auto [t, i] : query[v]) {
      |               ^
harvest.cpp: In function 'int main()':
harvest.cpp:134:12: 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]
  134 |   while (j < b.size() && b[j] < a[0]) {
      |          ~~^~~~~~~~~~
harvest.cpp:139:14: 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]
  139 |     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:144:12: 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]
  144 |   assert(j == b.size());
      |          ~~^~~~~~~~~~~
harvest.cpp:190:25: warning: unused variable 'v' [-Wunused-variable]
  190 |       int u = cycle[i], v = cycle[(i + 1) % sz];
      |                         ^
harvest.cpp:201:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  201 |       for (auto [t, ind] : query[v]) {
      |                 ^
harvest.cpp:212:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  212 |     for (auto [t, arr] : mp) {
      |               ^
harvest.cpp:213:18: 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]
  213 |       while (ind < u.size() && u[ind] <= t) {
      |              ~~~~^~~~~~~~~~
harvest.cpp:220:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  220 |       for (auto [pos, i] : arr) {
      |                 ^
harvest.cpp:239:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  239 |       for (auto [t, ind] : query[v]) {
      |                 ^

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 23388 KB Output is correct
2 Correct 12 ms 25528 KB Output is correct
3 Correct 21 ms 26036 KB Output is correct
4 Correct 11 ms 23896 KB Output is correct
5 Correct 14 ms 24156 KB Output is correct
6 Correct 15 ms 24156 KB Output is correct
7 Correct 14 ms 24156 KB Output is correct
8 Correct 10 ms 23644 KB Output is correct
9 Correct 10 ms 23644 KB Output is correct
10 Correct 10 ms 23644 KB Output is correct
11 Correct 12 ms 23728 KB Output is correct
12 Correct 57 ms 23896 KB Output is correct
13 Correct 57 ms 24104 KB Output is correct
14 Correct 28 ms 23836 KB Output is correct
15 Correct 12 ms 23900 KB Output is correct
16 Correct 12 ms 23900 KB Output is correct
17 Correct 12 ms 23900 KB Output is correct
18 Correct 12 ms 23900 KB Output is correct
19 Correct 12 ms 23900 KB Output is correct
20 Correct 11 ms 23900 KB Output is correct

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 949 ms 52056 KB Output is correct
2 Correct 415 ms 42864 KB Output is correct
3 Correct 464 ms 176748 KB Output is correct
4 Correct 1086 ms 201436 KB Output is correct
5 Correct 538 ms 79092 KB Output is correct
6 Correct 685 ms 79016 KB Output is correct
7 Correct 342 ms 41520 KB Output is correct
8 Correct 326 ms 42284 KB Output is correct
9 Execution timed out 5072 ms 67632 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #3
0 / 75.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 23388 KB Output is correct
2 Correct 12 ms 25528 KB Output is correct
3 Correct 21 ms 26036 KB Output is correct
4 Correct 11 ms 23896 KB Output is correct
5 Correct 14 ms 24156 KB Output is correct
6 Correct 15 ms 24156 KB Output is correct
7 Correct 14 ms 24156 KB Output is correct
8 Correct 10 ms 23644 KB Output is correct
9 Correct 10 ms 23644 KB Output is correct
10 Correct 10 ms 23644 KB Output is correct
11 Correct 12 ms 23728 KB Output is correct
12 Correct 57 ms 23896 KB Output is correct
13 Correct 57 ms 24104 KB Output is correct
14 Correct 28 ms 23836 KB Output is correct
15 Correct 12 ms 23900 KB Output is correct
16 Correct 12 ms 23900 KB Output is correct
17 Correct 12 ms 23900 KB Output is correct
18 Correct 12 ms 23900 KB Output is correct
19 Correct 12 ms 23900 KB Output is correct
20 Correct 11 ms 23900 KB Output is correct
21 Correct 949 ms 52056 KB Output is correct
22 Correct 415 ms 42864 KB Output is correct
23 Correct 464 ms 176748 KB Output is correct
24 Correct 1086 ms 201436 KB Output is correct
25 Correct 538 ms 79092 KB Output is correct
26 Correct 685 ms 79016 KB Output is correct
27 Correct 342 ms 41520 KB Output is correct
28 Correct 326 ms 42284 KB Output is correct
29 Execution timed out 5072 ms 67632 KB Time limit exceeded
30 Halted 0 ms 0 KB -