Submission #654763

#	Time	Username	Problem	Language	Result	Execution time	Memory
654763		Antekb	Matching (CEOI11_mat)	C++14	73 / 100	2071 ms	65536 KiB

mat

#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=2e6+5, INF=1e9+5, mod=1e9+7;
int co[N], co2[N], pref[N];
int main(){
	BOOST;
	int n, m;
	cin>>n>>m;
	vi V(n), V3(n), V2;
	for(int &i:V3)cin>>i;
	for(int i=0; i<n; i++){
		V[V3[i]-1]=i+1;
	}
	//for(int i:V)cout<<i<<" ";
	set<pii> S, S2;
	S.insert({0, -1});
	S2.insert({n+1, -1});
	for(int i=0; i<n; i++){
		co[i]=S.upper_bound({-V[i], i})->nd;
		S.insert({-V[i], i});
		//deb(co[i], co2[i]);
	}
	S.clear();
	for(int i=0; i<n; i++){
		co2[i]=S2.upper_bound({V[i], i})->nd;
		S2.insert({V[i], i});
	}
	S2.clear();
	for(int i:V)V2.pb(i);
		V.clear();
	for(int i=0; i<m; i++){
		int x;
		cin>>x;
		V2.pb(x);
	}
	vi ans;
	for(int i=2; i<n+m; i++){
		pref[i]=pref[i-1];
		while(pref[i]){
			if(pref[i]!=n-1 && (co[pref[i]+1]==-1 || V2[i]>V2[i-pref[i]-1+co[pref[i]+1]])
			 && (co2[pref[i]+1]==-1 || V2[i]<V2[i-pref[i]-1+co2[pref[i]+1]])){
				break;
			}
			pref[i]=pref[pref[i]];
		}
		if(pref[i]!=n-1 && (co[pref[i]+1]==-1 || V2[i]>V2[i-pref[i]-1+co[pref[i]+1]])
			 && (co2[pref[i]+1]==-1 || V2[i]<V2[i-pref[i]-1+co2[pref[i]+1]])){
			pref[i]++;
		}
		//deb(i-n, pref[i]);
		if(pref[i]==n-1 && i-n>=n-1){
			ans.pb(i-n-n+2);
		}
	}
	cout<<ans.size()<<"\n";
	for(int i:ans)cout<<i<<" ";
}

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 9 / 9
• Subtask 8: 0 / 9
• Subtask 9: 0 / 8
• Subtask 10: 0 / 10
• Subtask 11: 10 / 10