Submission #858465

#	Time	Username	Problem	Language	Result	Execution time	Memory
858465		ilef	Job Scheduling (CEOI12_jobs)	C++14	100 / 100	333 ms	26488 KiB

jobs

#include <bits/stdc++.h>
using namespace std;
#define all(x) begin(x), end(x)
#define mp make_pair
using pi = pair<int, int>;
using vi = vector<int>;
int N, D, M;

pair<bool, vector<vi>> isFeasible(const vector<pi> &jobs, int machineCount) {
	vector<vi> schedule(N);
	int reqNum = 0;
	for (int day = 1; day <= N; day++) {
		for (int j = 0; j < machineCount; j++) {
			if (jobs[reqNum].first > day) break;
			if (jobs[reqNum].first + D >= day)
				schedule[day - 1].push_back(jobs[reqNum++].second);
			else return mp(false, schedule);
			if (reqNum == M) return mp(true, schedule);
		}
	}
	return mp(false, schedule);
}

int main() {
	cin.tie(0)->sync_with_stdio(false);

	cin >> N >> D >> M;
	vector<pi> jobs(M);
	for (int i = 0; i < M; i++) {
		int day;
		cin >> day;
		jobs[i] = mp(day, i + 1);
	}
	sort(all(jobs));

	vector<vi> result;
	int l = 1, r = M;
	while (l < r) {
		int machineNum = (l + r) / 2;
		pair<bool, vector<vi>> curResult = isFeasible(jobs, machineNum);
	
		if (curResult.first) {
			r = machineNum;
			result = curResult.second;
		}
		else
			l = machineNum + 1;
	}

	cout << l << "\n";
	for (int i = 0; i < N; i++) {
		for (int &idx : result[i]) cout << idx << " ";
		cout << 0 << "\n";
	}
}

• Subtask 1: 100 / 100