#define _USE_MATH_DEFINES
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
#define _SILENCE_ALL_CXX17_DEPRECATION_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
//#include <bits/stdc++.h>

#include <cstdio>
#include <cmath>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <bitset>
#include <unordered_map>
#include <unordered_set>
#include <cassert>
#include <fstream>
#include <array>
#include <string>
#include <cstring>
#include <functional>
#include <ctime>
#include <iostream>
#include <unordered_set>
#include <complex>

#include <nmmintrin.h>
#include <mmintrin.h>
#include <emmintrin.h>


using namespace std;

#define dprint(Exp,...) if(Exp){fprintf(stderr, __VA_ARGS__);}
#define printe(...) fprintf(stderr, __VA_ARGS__);
//#define printe(...) void();
#define printE(...) fprintf(stderr, __VA_ARGS__);
//#define printE(...) void();


#define PrtExp(_Exp)  cerr<< #_Exp <<" = "<< (_Exp)
#define PrtExpN(_Exp)  cerr<< #_Exp <<" = "<< (_Exp) <<"\n"

#define SINT(n) scanf("%d",&n)
#define SINT2(n,m) scanf("%d %d",&n,&m)
#define SINT3(n,m,o) scanf("%d %d %d",&n,&m,&o)
#define SINT4(n,m,o,P) scanf("%d %d %d %d",&n,&m,&o,&P)
#define SINT5(n,m,o,P,q) scanf("%d %d %d %d %d",&n,&m,&o,&P,&q)
#define SLL(n) scanf("%lld",&n)
#define SLL2(n,m) scanf("%lld %lld",&n,&m)
#define SLL3(n,m,o) scanf("%lld %lld %lld",&n,&m,&o)
#define SST(s) scanf("%s",s)
#define SCH(c) scanf("%c",&c)

#define GC() getchar()

#define PINT(n) printf("%d",(int)(n))
#define PINT2(n,m) printf("%d %d",(int)(n),(int)(m))
#define PINT3(n,m,l) printf("%d %d %d",(int)(n),(int)(m),(int)(l))
#define PLL(n) printf("%lld",(long long)(n))
#define PST(s) printf("%s",(s))
#define PCH(s) printf("%c",(s))

#define PINTN(n) printf("%d\n",(int)(n))
#define PINT2N(n,m) printf("%d %d\n",(int)(n),(int)(m))
#define PINT3N(n,m,l) printf("%d %d %d\n",(int)(n),(int)(m),(int)(l))
#define PLLN(n) printf("%lld\n",(long long)(n))
#define PSTN(s) printf("%s\n",(s))
#define PCHN(s) printf("%c\n",(s))

#define PSP() printf(" ")
#define PN() printf("\n")

#define PC(c) putchar(c)
#define CSP (' ')
#define SN ("\n")

#define rep(i,a) for(int i=0;i<a;i++)
#define reP(i,a) for(int i=0;i<=a;i++)
#define Rep(i,a) for(int i=a-1;i>=0;i--)
#define ReP(i,a) for(int i=a;i>=0;i--)

#define rEp(i,a) for(i=0;i<a;i++)
#define rEP(i,a) for(i=0;i<=a;i++)
#define REp(i,a) for(i=a-1;i>=0;i--)
#define REP(i,a) for(i=a;i>=0;i--)

#define repft(i,a,b) for(int i=a;i<b;i++)
#define repfT(i,a,b) for(int i=a;i<=b;i++)
#define Repft(i,a,b) for(int i=a-1;i>=b;i--)
#define RepfT(i,a,b) for(int i=a;i>=b;i--)

#define foreach(a,it) for(auto it = a.begin(); it != a.end(); ++it)

#define FILL(a,v) fill(begin(a),end(a), v)
#define FILL0(a) memset(a,0,sizeof(a))
#define FILL1(a) memset(a,-1,sizeof(a))

typedef long long ll;

typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll>   Pll;


const int INF = 1'010'000'000; // 0x3C33'6080
const ll INFLL = 0x1f1f1f1f1f1f1f1fLL;//2,242,545,357,980,376,863


template <class A, class B> inline ostream& operator<<(ostream& st, const pair<A, B>& P) { return st << "(" << P.first << "," << P.second << ")"; };
template <class A, class B> inline pair<A, B> operator+(const pair<A, B>& P, const pair<A, B>& Q) { return pair<A, B>(P.first + Q.first, P.second + Q.second); };
template <class A, class B> inline pair<A, B> operator-(const pair<A, B>& P, const pair<A, B>& Q) { return pair<A, B>(P.first - Q.first, P.second - Q.second); };


inline ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }


const int ALOG = 9;
const int A = (1 << ALOG);
int n;
int v[1 << 19];
int w[1 << 19];

vector<Pi> x[100005]; // 重さ(以下), 価値

void dfs(int i, int remDep, const vector<Pi>& a) {
    if (i > n) return;

    x[i].reserve(a.size() * 2);
    int W = w[i];
    int V = v[i];

    for (const auto p : a) {
        x[i].emplace_back(p);
        x[i].emplace_back(p.first + W, p.second + V);
    }
    if (remDep > 0 && i * 2 <= n) {
        dfs(i * 2 + 0, remDep - 1, x[i]);
        dfs(i * 2 + 1, remDep - 1, x[i]);
    }

    sort(x[i].begin(), x[i].end());
    int ma = x[i][0].second;
    for (auto& p : x[i]) {
        p.second = ma = max(ma, p.second);
    }
}


int main() {
    cin >> n;

    rep(i, n) {
        cin >> v[i + 1] >> w[i + 1];
    }
    int q;
    cin >> q;
    vector<int> qv(q);
    vector<int> ql(q);
    rep(i, q) {
        cin >> qv[i] >> ql[i];
    }

    {
        x[0].emplace_back(0, 0);
        dfs(1, ALOG, x[0]);
    }

    vector<Pi> a, b;
    a.reserve(1 << 12);
    b.reserve(1 << 12);

    /*
    repfT(i, 1, A * 2) {
        cout << "# " << i << endl;
        for (auto p : x[i]) cout << p << endl;
    }
    */

    rep(i, q) {
        int vv = qv[i];
        int L = ql[i];
        a.clear();
        a.emplace_back(0, 0);

        int j = vv;
        for (; j >= A * 2; j >>= 1) {
            b.clear();
            int W = w[j];
            int V = v[j];
            for (const auto p : a) {
                b.emplace_back(p);
                b.emplace_back(p.first + W, p.second + V);
            }
            a.swap(b);
        }
        int ret = 0;
        for (const auto p : a) {
            if (p.first > L) continue;

            const Pi F{ L - p.first, INF };
            auto it = upper_bound(x[j].begin(), x[j].end(), F);

            /*
            cerr << p << F;
            if (it == x[j].end()) {
                cerr << "x" << endl;
            } else {
                cerr << *it << endl;
            }
            /*
            if (it == x[j].begin()) {
                cerr << "x" << endl;
            } else {
                auto itt = it; --itt;
                cerr << *itt << endl;
            }
            */


            if (it == x[j].begin()) continue;
            --it;
            ret = max(ret, p.second + it->second);
        }
        cout << ret << endl;


    }

    return 0;
}


/*

2**18 = 262,144
2** 9 = 512


512 * 512
100000 * 512 * 9


a + b = log(n)

2^a + a * 2^b


a = 10 b = 8    256 000 000
a = 12 b = 6     76 800 000



*/


Measured memory_bytes: 14024