Submission #677490

#	Time	Username	Problem	Language	Result	Execution time	Memory
677490		triet123vn	Job Scheduling (CEOI12_jobs)	C++11	0 / 100	130 ms	2636 KiB

jobs

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const string FNAME = "jobschedule";
const int MAXN = 100002, MAXM = 1000000;

struct Job {
  int numJob, deadline;
  Job() {}
  Job(int num, int d) {
    numJob = num;
    deadline = d;
  }
};

struct cmp {
  bool operator() (const Job &a, const Job &b) {
    if (a.deadline == b.deadline) return a.numJob < b.numJob;
    return a.deadline < b.deadline;
  }
};

int dayJobs[MAXN], tempDay[MAXN];
int n, delays, m;

bool goodJob(int machineNum) {
  priority_queue<Job, vector<Job>, cmp> q;
  for (int i = 1; i <= n; ++i) {
    q.push(Job(dayJobs[i], i + delays));

    int remain = machineNum - q.top().numJob;
    while (q.size() && remain >= 0) {
      q.pop();
      if (q.size()) remain -= q.top().numJob;
    }
    if (q.size() && remain < 0) {
      Job j = q.top();
      j.numJob = -remain;
      q.pop();
      q.push(j);
    }
  }

  return q.empty();
}

int minMachine(int l, int r) {
  if (l == r) return l;
  int mid = (l + r) / 2;
  if (goodJob(mid)) return minMachine(l, mid);
  return minMachine(mid + 1, r);
}

int main() {
  ios_base::sync_with_stdio(false);
  cout.tie(NULL);
  cin.tie(NULL);

//  freopen((FNAME + ".in").c_str(), "r", stdin);
//  freopen((FNAME + ".out").c_str(), "w", stdout);

  cin >> n >> delays >> m;

  for (int i = 0; i < m; ++i) {
    int day;
    cin >> day;
    ++dayJobs[day];
  }

  cout << minMachine(1, 1000000);

  return 0;
}

• Subtask 1: 0 / 100