Submission #658240

#	Time	Username	Problem	Language	Result	Execution time	Memory
658240		Antekb	Teams (CEOI11_tea)	C++14	0 / 100	340 ms	109704 KiB

tea

#include<bits/stdc++.h>
 
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("trapv")
 
#define st first
#define nd second
#define pb push_back
#define pp pop_back
#define eb emplace_back
#define mp(a, b) make_pair(a, b)
#define all(x) (x).begin(), (x).end()
#define rev(x) reverse(all(x))
#define sor(x) sort(all(x))
#define sz(x) (int)(x).size()
#define rsz(x) resize(x)
 
using namespace std;
 
///~~~~~~~~~~~~~~~~~~~~~~~~~~
 
template <typename H, typename T> 
ostream& operator<<(ostream& os, pair<H, T> m){
	return os <<"("<< m.st<<", "<<m.nd<<")";
}
template <typename H> 
ostream& operator<<(ostream& os, vector<H> V){
	os<<"{";
	for(int i=0; i<V.size(); i++){
		if(i)os<<" ";
		os<<V[i];
	}
	os<<"}";
	return os;
}
 
void debug(){cerr<<"\n";}
template <typename H, typename... T>
void debug(H h, T... t) {cerr<<h; if (sizeof...(t)) cerr << ", "; debug(t...);}
#define deb(x...) cerr<<#x<<" = ";debug(x);
 
///~~~~~~~~~~~~~~~~~~~~~~~~~
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<pii > vii;
typedef vector<ll> vl;
typedef vector<pll> vll;
typedef string str;
 
#define BOOST ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
 
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
 
const int N=1e6+5, INF=1e9+5, mod=1e9+7;
vi id[N], id2[N], mini[N];//id-kto ma dp o takiej wartosci, mini-najmniejsza najwieksza druzyna
int dp[N], gdzie[N], par[N], opt[N], mi[N];//dp-ile druz, gdzie-numer w wektorze, par-rodzic, opt-maxi na przedziale 
int main(){
	BOOST;
	int n;
	cin>>n;
	vii V(n+1);
	for(int i=1; i<=n; i++){
		cin>>V[i].st;
		V[i].nd=i;
	}
	sor(V);
	id[0].pb(0);
	for(int i=1; i<=n; i++){
		//deb(i);
		int j=i-V[i].st;
		if(j<0){
			opt[i]=opt[i-1];
		}
		else{
			//deb(i);
			int k=opt[j];
			dp[i]=k+1;
			opt[i]=max(opt[i-1], k+1);
			id[k+1].pb(i);
		}
		//deb(dp[i]);
	}
	for(int k=0; k<dp[n]; k++){
		vii spec;
		for(int j:id[k+1])spec.eb(j-V[j].st, j);
		sor(spec);
		rev(spec);
		id[k].pb(n+1);
		for(int j:id[k]){
			while(spec.size() && spec.back().st<j){
				int i=spec.back().nd;
				int l=0, r=id2[k].size();
				while(l<r){
					int m=(l+r)>>1;
					if(i-m>=mini[k][m])l=m+1;
					else r=m;
				}
				//deb(i);
				int m;
				if(l==id2[k].size() || id2[k][l]>j || (l!=0 && i-l+1>mini[k][l])){
					par[i]=id2[k][l-1];
					m=i-l+1;
				}
				else{
					par[i]=id2[k][l];
					m=mini[k][l];
				}
				mi[i]=m;
				spec.pp();
			}
			if(j==n+1)break;
			while(id2[k].size() && mi[j]<=mini[k].back()){
				id2[k].pp();
				mini[k].pp();
			}
			id2[k].pb(j);
			mini[k].pb(mi[j]);
		}
	}
	for(int i=1; i<=n; i++){
		//deb(i, dp[i], par[i], mi[i]);
	}
	cout<<dp[n]<<"\n";
	int v=n;
	while(v!=0){
		int v2=par[v];
		cout<<v-v2<<" ";
		for(int i=v; i>v2; i--){
			cout<<V[i].nd<<" ";
		}
		cout<<"\n";
		v=v2;
	}
}

Compilation message (stderr)

tea.cpp: In function 'int main()':
tea.cpp:104:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |     if(l==id2[k].size() || id2[k][l]>j || (l!=0 && i-l+1>mini[k][l])){
      |        ~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
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• Subtask 10: 0 / 10