Submission #642400

#	Time	Username	Problem	Language	Result	Execution time	Memory
642400		accidentac	Job Scheduling (CEOI12_jobs)	C++14	0 / 100	330 ms	7328 KiB

jobs

#include <bits/stdc++.h>
using namespace std;
 
// return true if can use count no. of machines to handle all jobs
bool ok(int count, int n, int d, int m, vector<array<int, 2>>& jobs) {
	for (int i = 1, start = 0, end = 0; i <= n; i++) {
		while (end < m && jobs[end][0] <= i) {
			end++;
		}
		int cur = 0;
		while (start < end && cur < count) {
			if (i - jobs[start][0] > d) return false;
			start++;
			cur++;
			if (start == m) return true;
		}
	}
	return false;
}
 
int main() {
	// ios_base::sync_with_stdio(0);
	// cin.tie(0);
	int n, d, m;
	cin >> n >> d >> m;
	vector<array<int, 2>> jobs(m);
	for (int i = 0; i < m; i++) {
		cin >> jobs[i][0];
		jobs[i][1] = i + 1;
	}
	sort(jobs.begin(), jobs.end());
	int lo = 1, hi = m, ans = m;
	while (lo <= hi) {
		int mid = lo + (hi - lo) / 2;
		if (ok(mid, n, d, m, jobs)) {
			ans = mid;
			hi = mid - 1;
		} else {
			lo = mid + 1;
		}
	}
	cout << ans << endl;
}

• Subtask 1: 0 / 100