oj.uz

Submission #786858

# Submission time Handle Problem Language Result Execution time Memory
786858 2023-07-18T13:57:30 Z penguin133 Passport (JOI23_passport) C++17
6 / 100
 708 ms 179884 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, q, L[200005], R[200005], cl[200005], cr[200005];

struct node{
	int s, e, m, val;
	node *l, *r;
	node(int _s, int _e){
		s = _s, e = _e, m = (s + e) >> 1;
		val = 0;
		if(s != e)l = new node(s, m), r = new node(m+1, e);
	}
	
	void upd(int p, int v){
		if(s == e){
			val = v;
			return;
		}
		if(p <= m)l->upd(p, v);
		else r->upd(p, v);
		val = min(l->val, r->val);
	}
	
	int qry(int a, int b){
		if(s == a && b == e)return val;
		else if(b <= m)return l->qry(a, b);
		else if(a > m)return r->qry(a, b);
		else return min(l->qry(a, m), r->qry(m+1, b));
	}
}*root;

vector <pi> adj[600005];
int dist[600005];
int cnt;

struct node2{
	int s, e, m, nd;
	node2  *l, *r;
	node2(int _s, int _e){
		s = _s, e = _e, m = (s + e) >> 1;
		
		if(s != e){
			nd = ++cnt;
			l = new node2(s, m);
			r = new node2(m+1, e);
			adj[l->nd].push_back({nd, 0});
			adj[r->nd].push_back({nd, 0});
		}
		else nd = s;
	}
	
	void upd(int a, int b, int u){
		if(s == a && e == b){
			adj[nd].push_back({u, 1});
			return;
		}
		if(b <= m)l->upd(a, b, u);
		else if(a > m)r->upd(a, b, u);
		else l->upd(a, m, u), r->upd(m+1, b, u);
	}
}*root2;

void solve(){
	cin >> n;
	for(int i=1;i<=n;i++)cin >> L[i] >> R[i];
	root = new node(1, n);
	for(int i=2;i<=n;i++){
		if(L[i] == i){
			cl[i] = 1e18;
		}
		else cl[i] = root->qry(L[i], i - 1) + 1;
		root->upd(i, cl[i]);
	}
	root = new node(1, n);
	for(int i=n-1;i>=1;i--){
		if(R[i] == i){
			cr[i] = 1e18;
		}
		else cr[i] = root->qry(i + 1, R[i]) + 1;
		root->upd(i, cr[i]);
	}
	cnt = n;
	root2 = new node2(1, n);
	for(int i=1;i<=n;i++)root2->upd(L[i], R[i], i);
	priority_queue <pi, vector <pi>, greater <pi> > pq;
	for(int i=1;i<=n;i++){
		dist[i] = cl[i] + cr[i];
		//cout << dist[i] << ' ';
		if(L[i] == 1 && R[i] == n)dist[i] = 1;
		pq.push({dist[i], i});
	}
	for(int i=n+1;i<=cnt;i++)dist[i] = 1e18;
	while(!pq.empty()){
		int x = pq.top().fi, y = pq.top().se;
		pq.pop();
		if(dist[y] < x)continue;
		for(auto [i, j] : adj[y]){
			if(dist[i] > x + j)dist[i] = x + j, pq.push({dist[i], i});
		}
	}
	//for(int i=1;i<=cnt;i++)cout << dist[i] << ' ';
	//cout << '\n';
	cin >> q;
	while(q--){
		int x; cin >> x;
		if(dist[x] > 1e9)cout << -1 << '\n';
		else cout << dist[x] << '\n';
	}
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message

passport.cpp:122:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  122 | main(){
      | ^~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 7 ms 14420 KB Output is correct
3 Correct 6 ms 14420 KB Output is correct
4 Correct 708 ms 179884 KB Output is correct
5 Correct 343 ms 135880 KB Output is correct
6 Correct 258 ms 126264 KB Output is correct
7 Correct 218 ms 117904 KB Output is correct
8 Correct 192 ms 117144 KB Output is correct

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 6 ms 14424 KB Output is correct
3 Correct 7 ms 14356 KB Output is correct
4 Correct 7 ms 14332 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 7 ms 14452 KB Output is correct
8 Incorrect 7 ms 14420 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 6 ms 14424 KB Output is correct
3 Correct 7 ms 14356 KB Output is correct
4 Correct 7 ms 14332 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 7 ms 14452 KB Output is correct
8 Incorrect 7 ms 14420 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 6 ms 14424 KB Output is correct
3 Correct 7 ms 14356 KB Output is correct
4 Correct 7 ms 14332 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 7 ms 14452 KB Output is correct
8 Incorrect 7 ms 14420 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 7 ms 14420 KB Output is correct
3 Correct 6 ms 14420 KB Output is correct
4 Correct 708 ms 179884 KB Output is correct
5 Correct 343 ms 135880 KB Output is correct
6 Correct 258 ms 126264 KB Output is correct
7 Correct 218 ms 117904 KB Output is correct
8 Correct 192 ms 117144 KB Output is correct
9 Correct 7 ms 14420 KB Output is correct
10 Correct 6 ms 14424 KB Output is correct
11 Correct 7 ms 14356 KB Output is correct
12 Correct 7 ms 14332 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 7 ms 14420 KB Output is correct
15 Correct 7 ms 14452 KB Output is correct
16 Incorrect 7 ms 14420 KB Output isn't correct
17 Halted 0 ms 0 KB -