Submission #971391

#	Time	Username	Problem	Language	Result	Execution time	Memory
971391		LCJLY	Passport (JOI23_passport)	C++14	0 / 100	2045 ms	32336 KiB

passport

#include <bits/stdc++.h>
using namespace std;
	
#define int long long 
#define ld long double
#define show(x,y) cout << y << " " << #x << endl;
#define show2(x,y,i,j) cout << y << " " << #x << "  " << j << " " << #i << endl;
#define show3(x,y,i,j,p,q) cout << y << " " << #x << "  " << j << " " << #i << "  " << q << " " << #p << endl;
#define show4(x,y) for(auto it:y) cout << it << " "; cout << #x << endl;
typedef pair<long long,long long>pii;
typedef pair<int,pii>pi2;
mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());

inline pii combine(pii a, pii b){
	return {min(a.first,b.first),max(a.second,b.second)};
}

struct node{	
	int s,e,m;
	node *l,*r;
	pii v;
	
	node(int ss, int ee):s(ss),e(ee),m((s+e)>>1){
		v={0,0};
		if(s!=e){
			l=new node(s,m);
			r=new node(m+1,e);
		}
	}
	
	void upd(int x, pii y){
		if(s==e){
			v=y;
			return;
		}
		if(x<=m) l->upd(x,y);
		else r->upd(x,y);
		v=combine(l->v,r->v); 
	}
	
	pii query(int x, int y){
		if(x<=s&&y>=e){
			return v;
		}
		if(y<=m) return l->query(x,y);
		if(x>m) return r->query(x,y);
		return combine(l->query(x,m),r->query(m+1,y));
	}
};

void solve(){
	int n;
	cin >> n;
	pii arr[n+5];
	node st(0,n+5);
	for(int x=1;x<=n;x++){
		cin >> arr[x].first >> arr[x].second;
		st.upd(x,arr[x]);
	}
	
	int ans[n+5];
	for(int x=1;x<=n;x++){
		int l=arr[x].first;
		int r=arr[x].second;
		int counter=1;
		while(l!=1||r!=n){
			pii hold=st.query(l,r);
			if(hold==make_pair(l,r)) break;
			l=hold.first;
			r=hold.second;
			counter++;
		}
		if(l!=1||r!=n){
			ans[x]=-1;
		}
		else{
			ans[x]=counter;
		}
	}
	
	int q;
	cin >> q;
	int temp;
	for(int x=0;x<q;x++){
		cin >> temp;
		cout << ans[temp] << "\n";
	}
}
 
int32_t main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int t=1;
	//freopen("in.txt","r",stdin);
	//cin >> t;
	while(t--){
		solve();
	}
}

• Subtask 1: 0 / 6
• Subtask 2: 0 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 8
• Subtask 5: 0 / 46