#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<ctime>
#include<vector>
#include<queue>
#include<algorithm>
#include<string>
#include<sstream>
#include<cctype>
#include<cmath>
#include<iomanip>
#include<map>
#include<stack>
#include<set>
#include<functional>
#define in(x) x=read()
#define qr read()
#define int ll
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
namespace fastIO
{
    #define BUF_SIZE 100000
    bool IOerror=0;
    inline char nc()
	{
        static char buf[BUF_SIZE],*p1=buf+BUF_SIZE,*pend=buf+BUF_SIZE;
        if (p1==pend){
            p1=buf; pend=buf+fread(buf,1,BUF_SIZE,stdin);
            if (pend==p1){IOerror=1;return -1;}
        }
        return *p1++;
    }
    inline bool blank(char ch){return ch==' '||ch=='\n'||ch=='\r'||ch=='\t';}
    inline ll read()
	{
        bool sign=0; char ch=nc();ll x=0;
        for (;blank(ch);ch=nc());
        if (IOerror)return 0;
        if (ch=='-')sign=1,ch=nc();
        for (;ch>='0'&&ch<='9';ch=nc())x=x*10+ch-'0';
        if (sign)x=-x;
        return x;
    }
    #undef BUF_SIZE
};
using namespace fastIO;
int a[1000010],b[1000010];
// double p[1000010];
struct node
{
	double x;
	int id;
}p[1000010];
bool cmp(node p1,node p2)
{
	return p1.x<p2.x;
}
struct line
{
	int k=0,b=0;
	line(){}
	line(int kk,int bb){k=kk,b=bb;}
}c[1000010];
line operator + (line a,line b){return line(a.k+b.k,a.b+b.b);}
int c2[1000010],pos[1000010];
void add(int nl,int nr,int l,int r,int k,int b,int x)
{
	if(l<=nl&&nr<=r)
	{
		c[x].k+=k;
		c[x].b+=b;
		return;
	}
	int mid=(nl+nr)/2;
	if(l<=mid)add(nl,mid,l,r,k,b,x<<1);
	if(r>mid)add(mid+1,nr,l,r,k,b,x<<1|1);
}
void add2(int l,int r,int p,int v,int x)
{
	c2[x]+=v;
	if(l==r)return;
	int mid=(l+r)/2;
	if(p<=mid)add2(l,mid,p,v,x<<1);
	else add2(mid+1,r,p,v,x<<1|1);
}
line query(int l,int r,int p,int x)
{
	line ans=c[x];
	if(l==r)return ans;
	int mid=(l+r)/2;
	if(p<=mid)ans=ans+query(l,mid,p,x<<1);
	else ans=ans+query(mid+1,r,p,x<<1|1);
	return ans;
}
int find(int l,int r,int v,int x)
{
	// cout<<l<<' '<<r<<" "<<v<<":"<<c2[x<<1]<<'\n'
	if(l==r)return l;
	int mid=(l+r)/2;
	if(c2[x<<1]<v)return find(mid+1,r,v-c2[x<<1],x<<1|1);
	else return find(l,mid,v,x<<1);
}
signed main()
{
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	int n=qr;
	for(int i=1;i<=n;i++)
	{
		in(a[i]),in(b[i]);
		if(a[i]<0)a[i]*=-1,b[i]*=-1;
		p[i]=(node){-1.0*b[i]/a[i],i};
	}
	sort(p+1,p+1+n,cmp);
	for(int i=1;i<=n;i++)
	{
		pos[p[i].id]=i;
	}
	int sum=0;
	for(int i=1;i<=n;i++)
	{
		sum+=a[i];
		add(1,n+1,1,pos[i],-a[i],-b[i],1);
		add(1,n+1,pos[i]+1,n+1,a[i],b[i],1);
		add2(1,n+1,pos[i],a[i],1);
		int pp=find(1,n+1,(sum+1)/2,1);
		// cout<<pp<<" "<<p[pp].x<<'\n';
		line now=query(1,n+1,pp,1);
		printf("%.5f\n",now.k*(p[pp].x)+now.b);
	}
	return 0;
}