Submission #258479

#	Time	Username	Problem	Language	Result	Execution time	Memory
258479		YJU	Port Facility (JOI17_port_facility)	C++14	0 / 100	1 ms	384 KiB

port_facility

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef long double ld;
const ll MOD=1e9+7;
const ll N=2e5+5;
const ld pi=3.14159265359;
const ll INF=(1LL<<62);
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(a) (ll)a.size()

ll seg[4*N],x,y,n;
vector<pll> v;

void ins(ll id,ll l,ll r,ll to,ll d){
	if(r==l+1){++seg[id];return ;}
	ll mid=(l+r)/2;
	if(to<mid){
		ins(id*2,l,mid,to,d);
	}else{
		ins(id*2+1,mid,r,to,d);
	}
	seg[id]=seg[id*2]+seg[id*2+1];
}

ll SRC(ll id,ll l,ll r,ll ql,ll qr){
	if(l>=ql&&r<=qr)return seg[id];
	if(l>=qr||r<=ql)return 0;
	ll mid=(l+r)/2;
	return SRC(id*2,l,mid,ql,qr)+SRC(id*2+1,mid,r,ql,qr);
}

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n;
	REP1(i,n){
		cin>>x>>y;v.pb(mp(x,y));
	}
	ll ans=1;
	sort(v.begin(),v.end());
	for(auto i:v){
		ll tmp=SRC(1,0,N,i.X,i.Y);
		if(tmp<=1){
			if(tmp==0)ans=(ans*2)%MOD;
			ins(1,0,N,i.Y,1);
		}else{
			ans*=0;
		}
	}
	cout<<ans<<"\n";
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 56
• Subtask 4: 0 / 22