using System;
using System.Collections.Generic;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using static System.Math;
using System.Numerics;
using System.Runtime.CompilerServices;
static class Program{
	const int mod=(int)1e9+7;
	const double eps=1e-11;
	static void Main(){
		Sc sc=new Sc();
		var n=sc.I;
		var h=new int[n+1][];
		var ma=new int[n+1];
		int d=10,m=Min((1<<d)-1,n);
		int g=(int)Log(m,2);
		var dp=new (int v,int w)[n+1][];
		h[0]=new int[2];
		dp[0]=new (int,int)[1];
		dp[0][0]=(0,0);
		ma[0]=1;
		var z=new (int v,int w)[1<<d+1];
		for(int i = 1;i<=n;i++) {
			h[i]=sc.Ia;
			if(i<=m){Fu(i,i>>1);}
		}
		var q=sc.I;
		var ans=new int[q];
		for(int i = 0;i<q;i++) {
			var e=sc.Ia;
			if(e[0]<=m){
				int lb=0,ub=ma[e[0]],mid=0;
				while(lb+1!=ub){
					mid=(ub+lb)>>1;
					if(dp[e[0]][mid].w>e[1]){ub=mid;}
					else{lb=mid;}
				}
				ans[i]=dp[e[0]][lb].v;
			}
			else{
				int p=((int)Log(e[0],2))-g-1,r=0,u=e[0]>>(p+1);
				if(ma[e[0]]==0){
					while(p>=0){
						if(ma[e[0]>>p]==0){Fu(e[0]>>p,r);}
						r=e[0]>>p;
						p--;
					}
				}
				for(int j = 0,k=ma[e[0]]-1;j<ma[u];j++) {
					while(k!=0&&dp[u][j].w+dp[e[0]][k].w>e[1]){k--;}
					if(dp[u][j].w+dp[e[0]][k].w<=e[1]){ans[i]=Max(ans[i],dp[u][j].v+dp[e[0]][k].v);}
				}
			}
		}
		Console.WriteLine("{0}",String.Join("\n",ans));
		void Fu(int i,int p) {
			int o=ma[p]<<1;
			dp[i]=new (int,int)[o];
			int k=0,l=0;
			for(int j = 0;j<dp[p].Length;j++) {
				z[j]=(dp[p][j].v+h[i][0],dp[p][j].w+h[i][1]);
				while(l<=j&&dp[p][j].w>z[l].w){
					if(k==0||dp[i][k-1].v<z[l].v){
						if(k!=0&&dp[i][k-1].w==z[l].w){dp[i][k-1].v=z[l].v;}
						else{
							dp[i][k]=z[l];
							k++;
						}
					}
					l++;
				}
				if(k==0||dp[i][k-1].v<dp[p][j].v){
					if(k!=0&&dp[i][k-1].w==dp[p][j].w){dp[i][k-1].v=dp[p][j].v;}
					else{
						dp[i][k]=dp[p][j];
						k++;
					}
				}
			}
			for(;l<ma[p];l++) {
				if(dp[i][k-1].v<z[l].v){
					if(dp[i][k-1].w==z[l].w){dp[i][k-1].v=Max(dp[i][k-1].v,z[l].v);}
					else{
						dp[i][k]=z[l];
						k++;
					}
				}
			}
			ma[i]=k;
		}
	}
}
public class Sc{
	public int I{get{return int.Parse(Console.ReadLine());}}
	public long L{get{return long.Parse(Console.ReadLine());}}
	public double D{get{return double.Parse(Console.ReadLine());}}
	public string S{get{return Console.ReadLine();}}
	public int[] Ia{get{return Array.ConvertAll(Console.ReadLine().Split(),int.Parse);}}
	public long[] La{get{return Array.ConvertAll(Console.ReadLine().Split(),long.Parse);}}
	public double[] Da{get{return Array.ConvertAll(Console.ReadLine().Split(),double.Parse);}}
	public string[] Sa{get{return Console.ReadLine().Split();}}
	public object[] Oa{get{return Console.ReadLine().Split();}}
	public int[] Ia2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),int.Parse);}}
	public int[] Ia3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),int.Parse);}
	public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}
	public long[] La3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),long.Parse);}
	public double[] Da2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),double.Parse);}}
	public double[] Da3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),double.Parse);}
	public T[] Arr<T>(int n,Func<T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f();}return a;}
	public T[] Arr<T>(int n,Func<int,T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i);}return a;}
	public T[] Arr<T>(int n,Func<string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(Console.ReadLine().Split());}return a;}
	public T[] Arr<T>(int n,Func<int,string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i,Console.ReadLine().Split());}return a;}
}

Measured memory_bytes: 349192