Submission #679818

#	Time	Username	Problem	Language	Result	Execution time	Memory
679818		peijar	Job Scheduling (CEOI12_jobs)	C++17	95 / 100	408 ms	32852 KiB

jobs

#include <bits/stdc++.h>
#define int long long
using namespace std;

namespace std {
template <typename T> ostream &operator<<(ostream &out, const vector<T> &vec) {
  out << "[";
  for (int i = 0; i < (int)vec.size(); ++i) {
    out << vec[i];
    if (i + 1 < (int)vec.size())
      out << ", ";
  }
  return out << "]";
}
} // namespace std

void dbg_out() { cout << endl; }
template <typename Head, typename... Tail> void dbg_out(Head H, Tail... T) {
  cout << ' ' << H;
  dbg_out(T...);
}

#ifdef DEBUG
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif

signed main(void) {
  ios_base::sync_with_stdio(false);
  cin.tie(0);

  int nbJours, nbTravaux, deadline;
  cin >> nbJours >> deadline >> nbTravaux;

  vector<int> debut(nbTravaux);
  for (int &x : debut) {
    cin >> x;
    --x;
  }
  vector<int> order(nbTravaux);
  iota(order.begin(), order.end(), 0);
  sort(order.begin(), order.end(),
       [&](int i, int j) { return debut[i] < debut[j]; });

  auto check = [&](int nbMachines) -> bool {
    queue<int> dispo;
    for (int i = 0; i < nbJours; ++i)
      dispo.push(i);
    vector<int> surTemps(nbJours);
    for (int i : order) {
      int t = debut[i];
      while (!dispo.empty() and dispo.front() < t)
        dispo.pop();
      if (dispo.empty() or dispo.front() > t + deadline)
        return false;

      int tt = dispo.front();
      if (tt > t + deadline)
        return false;
      surTemps[tt]++;
      if (surTemps[tt] == nbMachines)
        dispo.pop();
    }
    return true;
  };

  int lo = 1, up = nbTravaux;
  while (lo < up) {
    int mid = (lo + up) / 2;
    if (check(mid))
      up = mid;
    else
      lo = mid + 1;
  }
  cout << lo << endl;
  vector<vector<int>> onDay(nbJours);
  queue<int> dispo;
  for (int i = 0; i < nbJours; ++i)
    dispo.push(i);
  vector<int> surTemps(nbJours);
  for (int i : order) {
    int t = debut[i];
    while (!dispo.empty() and dispo.front() < t)
      dispo.pop();
    if (dispo.empty() or dispo.front() > t + deadline)
      assert(false);

    int tt = dispo.front();
    if (tt > t + deadline)
      assert(false);
    surTemps[tt]++;
    onDay[tt].push_back(i + 1);
    if (surTemps[tt] == lo)
      dispo.pop();
  }

  for (int i = 0; i < nbJours; ++i) {
    for (int x : onDay[i])
      cout << x << ' ';
    cout << 0 << '\n';
  }
}

• Subtask 1: 95 / 100