Submission #533874

#	Time	Username	Problem	Language	Result	Execution time	Memory
533874		CaroLinda	Teams (CEOI11_tea)	C++14	30 / 100	390 ms	143292 KiB

tea

#include <bits/stdc++.h>
 
#define mk make_pair
#define lp(i,a,b) for(int i = a ; i < b; i++ )
#define sz(x) (int)x.size()
#define all(x) x.begin(),x.end()
 
const int MAX = 1e6+5 ;
 
using namespace std ;
 
 
int main(){
	ios_base::sync_with_stdio(false );
	cin.tie(0) ;
 
	int N ;
	cin >> N ;
	vector<int> arr(N) , idx(N) ; iota(all(idx) , 0) ;
	vector<int> corte(N) , mx(N) , tam(N) ;
	for(auto &e : arr ) cin >> e ;
	sort(all(idx),[&](int a, int b) { return arr[a] > arr[b] ; }) ;
	vector<int> dp(N) ;
	vector< vector<int> > sweep( N+1 , vector<int>() ) ;

  	for(int i = 0 ; i < N ; i++ ){

  		if(arr[idx[i]]+i <= N) sweep[arr[idx[i]]+i].push_back(i) ;
  		
  		dp[i] = -2*N ;
  		corte[i] = -1 ;

  		if(i+1 >= arr[idx[0]]) dp[i] = 1 , tam[i] = i+1 ;

  		for(auto e : sweep[i+1]){
  			if(e == 0) continue ;
  			if( i-e+1 >= arr[idx[e]] && mk(dp[e-1]+1,-max(tam[e-1], i-e+1) ) > mk(dp[i] , -tam[i]) ){
  				corte[i] = e-1 ;
  				dp[i] = dp[e-1]+1 ;
  				tam[i] = max(tam[e-1] , i-e+1 ) ;
  			}
  		}

  		if(i && dp[i-1] > 0 ){
  			int p = i/dp[i-1] ;
  			if( tam[i-1] > p || tam[i-1]*dp[i-1] > i ){
  				if(mk(dp[i-1], -tam[i-1]) > mk(dp[i] , -tam[i]) ){
  					dp[i] = dp[i-1] ;
  					tam[i] = tam[i-1] ;
  					corte[i] = corte[i-1] ;
  				}
  			}
  		}

  		//cout << dp[i] << " " << tam[i] << endl ;
  	}

	vector<vector<int> > ans ;
 
	int x = N-1 ;
 
	while(x != -1){
		ans.push_back(vector<int>()) ;
		for(int i = corte[x]+1 ; i <= x ; i++ ) ans.back().push_back(idx[i]+1) ;
		x = corte[x] ;
	}
 
	cout << sz(ans) <<"\n" ;
 
	for(auto e : ans ){
		cout << sz(e) <<" " ;
		for(auto ee : e ) cout << ee <<" " ;
			cout << "\n" ;
	}
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 0 / 10