Submission #642374

#	Time	Username	Problem	Language	Result	Execution time	Memory
642374		accidentac	Job Scheduling (CEOI12_jobs)	C++14	0 / 100	312 ms	7336 KiB

jobs

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

int n, d, m;
vector<array<int, 2>> jobs;

// return true if can use count no. of machines to handle all jobs
bool ok(int count) {
	int finished = 0;
	for (int i = 1, l = 0, r = 0; i <= n; i++) {
		while (r < m && jobs[r][0] >= i) {
			r++;
		}
		// int cur = 0;
		// while (l < r && cur < count) {
		// 	if (i - jobs[l][0] > d) return false;
		// 	l++;
		// 	cur++;
		// 	if (l == m) return true;
		// }
	}
	return false;
}

int main() {
	// ios_base::sync_with_stdio(0);
	// cin.tie(0);
	cin >> n >> d >> m;
	jobs = vector<array<int, 2>>(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)) {
			ans = mid;
			hi = mid - 1;
		} else {
			lo = mid + 1;
		}
	}
	cout << ans << endl;
}

Compilation message (stderr)

jobs.cpp: In function 'bool ok(int)':
jobs.cpp:10:18: warning: unused variable 'l' [-Wunused-variable]
   10 |  for (int i = 1, l = 0, r = 0; i <= n; i++) {
      |                  ^
jobs.cpp:9:6: warning: unused variable 'finished' [-Wunused-variable]
    9 |  int finished = 0;
      |      ^~~~~~~~

• Subtask 1: 0 / 100