oj.uz

Submission #974101

# Submission time Handle Problem Language Result Execution time Memory
974101 2024-05-02T19:32:12 Z Ooops_sorry Harvest (JOI20_harvest) C++14
0 / 100
 128 ms 54240 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);
 
const int N = 2e5 + 10;
vector<int> mas[N];
 
vector<pair<int, int>> g[N];
bool on_cycle[N];
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;
    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];
      }
      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];
      if (a[u] >= a[v]) {
        pr[i + 1] = pr[i] + a[u] - a[v] + left;
      } else {
        pr[i + 1] = pr[i] + a[u] + l - a[v] + left;
      }
    }
    for (int i = 0; i < sz; i++) {
      int v = cycle[i];
      for (auto [t, ind] : query[v]) {
        for (int j = 0; j <= i; j++) {
          for (auto val : st[cycle[j]]) {
            if (val + pr[i] - pr[j] <= t) {
              ans[ind] += t / pr.back() - (val + pr[i] - pr[j]) / pr.back();
              if ((val + pr[i] - pr[j]) % pr.back() <= t % pr.back()) {
                ans[ind]++;
              }
            }
          }
        } 
        for (int j = i + 1; j < sz; j++) {
          for (auto val : st[cycle[j]]) {
            if (val + pr[i] + pr.back() - pr[j] <= t) {
              ans[ind] += t / pr.back() - (val + pr[i] - pr[j]) / pr.back() - 1;
              if ((val + pr[i] - pr[j]) % 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:38:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   38 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp: In function 'void dfs(long long int)':
harvest.cpp:53:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   53 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp:61:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   61 |   for (auto [u, c] : g[v]) {
      |             ^
harvest.cpp:69:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   69 |     for (auto [t, i] : query[v]) {
      |               ^
harvest.cpp: In function 'int main()':
harvest.cpp:106:12: 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]
  106 |   while (j < b.size() && b[j] < a[0]) {
      |          ~~^~~~~~~~~~
harvest.cpp:111:14: 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]
  111 |     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:116:12: 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]
  116 |   assert(j == b.size());
      |          ~~^~~~~~~~~~~
harvest.cpp:171:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  171 |       for (auto [t, ind] : query[v]) {
      |                 ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 23796 KB Output is correct
2 Correct 12 ms 26040 KB Output is correct
3 Correct 128 ms 25988 KB Output is correct
4 Correct 11 ms 23896 KB Output is correct
5 Correct 13 ms 24408 KB Output is correct
6 Correct 14 ms 24412 KB Output is correct
7 Correct 13 ms 24408 KB Output is correct
8 Correct 11 ms 23900 KB Output is correct
9 Correct 10 ms 23900 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 11 ms 24076 KB Output is correct
12 Correct 58 ms 24248 KB Output is correct
13 Incorrect 104 ms 24284 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 62 ms 54240 KB Execution killed with signal 8
2 Halted 0 ms 0 KB -

Subtask #3
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 23796 KB Output is correct
2 Correct 12 ms 26040 KB Output is correct
3 Correct 128 ms 25988 KB Output is correct
4 Correct 11 ms 23896 KB Output is correct
5 Correct 13 ms 24408 KB Output is correct
6 Correct 14 ms 24412 KB Output is correct
7 Correct 13 ms 24408 KB Output is correct
8 Correct 11 ms 23900 KB Output is correct
9 Correct 10 ms 23900 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 11 ms 24076 KB Output is correct
12 Correct 58 ms 24248 KB Output is correct
13 Incorrect 104 ms 24284 KB Output isn't correct
14 Halted 0 ms 0 KB -