Submission #851910

#	Time	Username	Problem	Language	Result	Execution time	Memory
851910		vjudge1	Osumnjičeni (COCI21_osumnjiceni)	C++17	0 / 110	283 ms	430208 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define sp << " " << 
#define int long long
#define vi vector<int>
#define pb push_back
#define F(xxx,yyy) for (int xxx=1;xxx<=yyy;xxx++)
const int N = 2e5+1;
const int MOD = 1e9;

vector<pair<int,int>> rng(N);
struct Node{
	pair<int,int> r;
	bool v;
	Node(pair<int,int> p = {0,0},int val=0) {
		r = p;
		v = val;
	};
};
Node t[4*N];

Node merge(Node& a,Node& b) {
	if (!a.v || !b.v) return {{0,0},0};
	if (a.r.first >= b.r.first && a.r.first <= b.r.second) return {{0,0},0};
	if (a.r.second >= b.r.first && a.r.second <= b.r.second) return {{0,0},0};
	if (b.r.first >= a.r.first && b.r.first <= a.r.second) return {{0,0},0};
	if (b.r.second >= a.r.first && b.r.second <= a.r.second) return {{0,0},0};
	return Node({min(a.r.first,b.r.first),max(a.r.second,b.r.second)},1);
}

void build(int node,int l,int r) {
	if (l == r) {
		t[node] = Node(rng[l],1);
		return;
	}
	int m = (l+r) >> 1;
	build(2*node,l,m);
	build(2*node+1,m+1,r);
	t[node] = merge(t[2*node],t[2*node+1]);
} 

Node query(int node,int l,int r,int L,int R) {
	if (l >= L && r <= R) return t[node];
	int m = (l+r) >> 1;
	if (m >= L && m+1 <= R) {
		Node a = query(2*node,l,m,L,R);
		Node b = query(2*node+1,m+1,r,L,R);
		return merge(a,b);
	}
	else if (m>=L) return query(2*node,l,m,L,R);
	else if (m+1 <= R)return query(2*node+1,m+1,r,L,R);
}


void solve() {
	int n;
	cin >> n;
	for (int i=1;i<=n;i++) cin >> rng[i].first >> rng[i].second;
	build(1,1,n);
	if (n <= 5000) {
		int go[n+1];
		for (int i=1;i<=n;i++) {
			int l = i;
			int r = n;
			while (l<=r) {
				int m = (l+r) >> 1;
				int x = query(1,1,n,i,m).v;
				if (x) l = m+1;
				else r = m-1;
			}
			go[i] = r;
		}	
		int dp[n+1][n+1];
		for (int i=1;i<=n;i++) dp[i][1] = go[i];
		for (int i=2;i<=n;i++) {
			for (int j=1;j<=n;j++) {
				dp[j][i] = go[dp[j][i-1]]+1;
			}
		}
		int q;
		cin >> q;
		while (q--) {
			int a,b;
			cin >> a >> b;
			int l = 1;
			int r = n;
			while (l<=r) {
				int m = (l+r) >> 1;
				if (dp[a][m] >= b) r = m-1;
				else l = m+1;
			}
			cout << l << endl;
		}
	} 
	else {
		;
	}
}    

 
 
 
                                
signed main() { 
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int t = 1;
    //cin >> t; 
    while (t --> 0) solve();
}
 
 
 

Compilation message (stderr)

Main.cpp: In function 'Node query(long long int, long long int, long long int, long long int, long long int)':
Main.cpp:52:1: warning: control reaches end of non-void function [-Wreturn-type]
   52 | }
      | ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 50