Submission #295838

#	Time	Username	Problem	Language	Result	Execution time	Memory
295838		Hemimor	Sails (IOI07_sails)	C++14	100 / 100	255 ms	3960 KiB

sails

#include <algorithm>
#include <iostream>
#include <iomanip>
#include <numeric>
#include <cassert>
#include <vector>
#include <cmath>
#include <queue>
#include <set>
#include <map>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<P,int> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-8;
const ll mod=1e9+7;
const int dx[4]={-1,0,1,0},dy[4]={0,-1,0,1};

class Lazy_Segment_Tree{
	private:
	int n;
	vi date,lazy;
	void Set_Lazy(int k,int x){
		date[k]+=x;
		lazy[k]+=x;
	}
	void Push(int k){
		Set_Lazy(k*2+1,lazy[k]);
		Set_Lazy(k*2+2,lazy[k]);
		lazy[k]=0;
	}
	void Fix(int k){
		date[k]=min(date[k*2+1],date[k*2+2]);
	}
	void Add_func(int a,int b,int k,int l,int r){
		if(r<=a||b<=l) return;
		if(a<=l&&r<=b){
			Set_Lazy(k,1);
			return;
		}
		Push(k);
		int m=(l+r)/2;
		Add_func(a,b,k*2+1,l,m);
		Add_func(a,b,k*2+2,m,r);
		Fix(k);
	}
	public:
	Lazy_Segment_Tree(int n_){
		n=1;
		while(n<n_) n*=2;
		date=lazy=vi(2*n-1);
	}
	void Add(int a,int b){
		if(a==b) return;
		Add_func(a,b,0,0,n);
	}
	int Query(int x){
		int k=0;
		while(k<n-1){
			Push(k);
//			if(x==-1) cout<<k<endl;
			if(date[k*2+1]>x) k=2*k+2;
			else k=2*k+1;
		}
		return k-n+1;
	}
	int Open(int k){
		k+=n-1;
		int res=date[k];
		while(k>0){
			k=(k-1)/2;
			res+=lazy[k];
		}
		return res;
	}
	ll Res(){
		for(int i=0;i<n-1;i++) Push(i);
		ll t=0;
		for(int i=0;i<n;i++){
			ll x=date[i+n-1];
			t+=x*(x-1)/2;
		}
		return t;
	}
};

const int M=1e5;
int n;
vp a;

int main(){
	Lazy_Segment_Tree st(M);
	cin>>n;
	a=vp(n);
	for(int i=0;i<n;i++) cin>>a[i].first>>a[i].second;
	sort(a.begin(),a.end());
	for(auto p:a){
		int h=p.first,x=p.second;
		int t=st.Open(h-x),l=st.Query(t),r=min(h,st.Query(t-1));
		st.Add(l,x-h+r+l);
		st.Add(r,h);
	}
	cout<<st.Res()<<endl;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10
• Subtask 11: 10 / 10