Submission #533632

#	Time	Username	Problem	Language	Result	Execution time	Memory
533632		CaroLinda	Teams (CEOI11_tea)	C++14	70 / 100	2581 ms	52444 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()
 
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) ;

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

		tam[i] = i+1 ;
		corte[i] = -1 ;

		if( i+1 < arr[idx[i]] ){
			dp[i] = mx[i] = 0 ;
			if(i) mx[i] = max(mx[i] , mx[i-1]) ;
		}
		else{
			dp[i] = mx[i] = max(1, mx[i-arr[idx[i]]]+1) ;
			if(i) mx[i] = max(mx[i] , mx[i-1]) ;
		}
	}

	vector<vector<int> > sweep(N+1, vector<int>()) ;
	for(int i = 0 ; i < N ; i++ ) sweep[dp[i]].push_back(i) ;

	for(int i = 1 ; i <= N ; i++ ){
		sort(all(sweep[i]) , [&](int a, int b){
			return a-arr[idx[a]] < b-arr[idx[b]] ;
		}) ;
	}

	auto getPair = [&](int x){

		return make_pair( tam[x]+x , x-tam[x] ) ;

	} ;

	vector<pair<int,int> > vec ;
	vector<int> indices ;

	for(int i = 2 ; i <= N ; i++ ){

		int ptr = 0 ;
	
		sort(all(sweep[i-1])) ;

		vec.clear() ;
		indices.clear() ;

		for(auto e : sweep[i] ) {
			
			while(ptr < sz(sweep[i-1]) && sweep[i-1][ptr] <= e-arr[idx[e]] ){
				indices.push_back(sweep[i-1][ptr]) ;
				vec.push_back(getPair(sweep[i-1][ptr++])) ;
			}

			tam[e] = N*2 ;

			for(int a = 0 ; a < sz(vec) ; a++){

				pair<int,int> p = vec[a] ;

				int dx = abs(p.first-e) ;
				int dy = abs(p.second-e) ;

				if( ((dx+dy)>>1) < tam[e]){
					tam[e] = (dx+dy)>>1 ;
					corte[e] = indices[a] ;
				}
			}
		}
	}

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