Submission #338328

#	Time	Username	Problem	Language	Result	Execution time	Memory
338328		lohacho	Teams (CEOI11_tea)	C++14	100 / 100	774 ms	262144 KiB

tea

#include <bits/stdc++.h>

using namespace std;

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int N;
	cin >> N;
	vector<pair<int, int>> a(N);
	for(int i = 0; i < N; ++i){
		cin >> a[i].first;
		a[i].second = i;
	}
	sort(a.begin(), a.end());
	reverse(a.begin(), a.end());
	vector<vector<int>> dp(N, vector<int>(3, -(int)1e9));
	vector<vector<int>> look(N);
	vector<int> nnow = {1, -a[0].first, -2};
	dp[a[0].first - 1] = nnow;
	for(int i = 0; i < N; ++i){
		for(auto&j:look[i]){
			vector<int> now = {dp[j][0] + 1, -max(-dp[j][1], i - j), j - 1};
			dp[i] = max(dp[i], now);
		}
		if(i){
			vector<int> now = {dp[i - 1][0], -(-dp[i - 1][1] + (i == dp[i - 1][0] * -dp[i - 1][1])), i - 1};
			dp[i] = max(dp[i], now);
		}
		if(i < N - 1 && i + a[i + 1].first < N){
			look[i + a[i + 1].first].push_back(i);
		}
	}
	look.resize(0);
	vector<vector<int>> teams;
	vector<int> pmin;
	priority_queue<pair<int, int>> pq;
	function<void(int)> f = [&](int x){
		if(x < 0){
			return;
		}
		if(dp[x][2] < x - 1){
			++dp[x][2];
			f(dp[x][2]);
			vector<int> np(x - dp[x][2]);
			for(int j = x; j > dp[x][2]; --j){
				np[x - j] = a[j].second;
			}
			pq.push({-(int)np.size(), (int)teams.size()});
			teams.push_back(np);
		}
		else{
			f(x - 1);
			int top = pq.top().second; pq.pop();
			teams[top].push_back(a[x].second);
			pq.push({-(int)teams[top].size(), top});
		}
	};
	f(N - 1);
	cout << (int)teams.size() << '\n';
	for(auto&i:teams){
		cout << (int)i.size() << ' ';
		for(auto&j:i){
			cout << j + 1 << ' ';
		}
		cout << '\n';
	}
	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10