Submission #536031

#	Time	Username	Problem	Language	Result	Execution time	Memory
536031		inksamurai	Osumnjičeni (COCI21_osumnjiceni)	C++17	40 / 110	1089 ms	16836 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,x,n) for(int i=x;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3HspL4A ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vec(int);
void print(){cout<<"\n";}
template<class T,class...E>
void print(const T&v,const E&...u){cout<<v<<' ',print(u...);}
// e

using vp=vec(pii);

const int inf=1e9+11;

int cross(int a,int b,int c,int d){
	if(c>=a and c<=b) return 1;
	if(a>=c and a<=d) return 1;
	if(d>=a and d<=b) return 1;
	if(b>=c and b<=d) return 1;
	return 0;
}

signed main(){
_3HspL4A;
	int n;
	cin>>n;
	vp a(n);
	rep(i,n){
		cin>>a[i].fi>>a[i].se;
	}
	
	vi tmp;
	rep(i,n){
		tmp.pb(a[i].fi);
		tmp.pb(a[i].se);
	}
	sort(tmp.begin(),tmp.end());
	tmp.erase(unique(tmp.begin(),tmp.end()),tmp.end());
	rep(i,n){
		a[i].fi=lower_bound(tmp.begin(),tmp.end(),a[i].fi)-tmp.begin();
		a[i].se=lower_bound(tmp.begin(),tmp.end(),a[i].se)-tmp.begin();
	}
	const int m=sz(tmp);

	multiset<pii> mst;
	vi nxt(n,-1);
	int j=0;
	rep(i,n){
		pii p=a[i];
		nxt[i]=i+1;
		if(!sz(mst)){
			mst.insert(p);
		}else{
			vi c={p.fi,p.se};
			while(1){
				bool pok=1;
				for(auto v:c){
					auto it=mst.lower_bound({v,-inf});
					if(it!=mst.end()){
						if(cross(it->fi,it->se,p.fi,p.se)) pok=0;
					}
					if(it!=mst.begin()){
						it=prev(it);
						if(cross(it->fi,it->se,p.fi,p.se)) pok=0;	
					}
				}	
				if(pok) break;
				mst.erase(mst.find({a[j].fi,a[j].se}));
				nxt[j]=i;
				j=j+1;
			}
			mst.insert(p);
		}
	}
	rng(k,j,n){
		nxt[k]=n;
	}
	int q;
	cin>>q;
	rep(_,q){
		int s,t;
		cin>>s>>t;
		s-=1;
		int i=s;
		int ans=0;
		while(1){
			if(i>=t) break;
			ans++;
			i=nxt[i];
		}
		print(ans);
	}
//	
	return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:52:12: warning: unused variable 'm' [-Wunused-variable]
   52 |  const int m=sz(tmp);
      |            ^

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