Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
import sys
from numba import njit

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

@njit('(i4,i4,i4,i4[:],i4[:],i4[:],i4[:])',cache=True)
def main(prev,remain,q,v,w,vq,lq):
    dp = np.zeros((2**prev+1,10**5+1),np.int32)
    for i in range(1,2**prev+1):
        vi = v[i]
        wi = w[i]
        dp[i]=dp[i//2]
        for j in range(wi,10**5+1):
            dp[i][j] = max(dp[i][j],dp[i//2][j-wi]+vi)
    for i in range(q):
        V,L= vq[i],lq[i]
        if V <= 2**prev:
            print(dp[V][L])
        else:
            ans = 0
            for j in range(2**remain):
                cur = V
                curw = 0
                curv = 0
                while cur > 2**prev:
                    if j & 1:
                        curv += v[cur]
                        curw += w[cur]
                    cur //= 2
                    j >>= 1
                if curw <= L:
                    ans = max(ans,dp[cur][L-curw]+curv)
            print(ans)

n = int(readline())
stdin = np.array(read().split(),np.int32)
v = np.zeros(n+1,np.int32)
w = np.zeros(n+1,np.int32)
v[1:] = stdin[:2*n:2]
w[1:] = stdin[1:2*n:2]
q = stdin[2*n]
query = stdin[2*n+1:]
vq = query[::2]
lq = query[1::2]
k = 0
num = 1
while num < n:
    k += 1
    num *= 2
prev = k//2
remain = k-k//2
main(prev,remain,q,v,w,vq,lq)

Fixed submission:
import numpy as np
import sys
from numba import njit
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

@njit('(i4,i4[:],i4[:])',cache=True)
def precompute(n,v,w):
    dp = np.zeros((1024,10**5+1),np.int32)
    for i in range(1,min(1024,n+1)):
        vi = v[i]
        wi = w[i]
        p = i//2
        dp[i]=dp[p]
        for j in range(wi,10**5+1):
            dp[i][j] = max(dp[i][j],dp[p][j-wi]+vi)
    return dp

@njit('(i4,i4[:],i4[:],i4[:],i4[:])',cache=True)
def main(n,v,w,vq,lq):
    dp = precompute(n,v,w)
    values = np.empty(1024,np.int32)
    weights = np.empty(1024,np.int32)

    def solve(V,L,values,weights,dp):
        if V < 1024:
            return dp[V][L]
        values[0] = 0
        weights[0] = 0
        p = 0
        while V >= 1024:
            for j in range(1 << p):
                values[j + (1 << p)] = values[j]+ v[V]
                weights[j + (1 << p)] = weights[j] + w[V]
            p += 1
            V >>= 1
        ans = 0
        for i in range(1 << p):
            if weights[i] <= L:
                x = dp[V][L-weights[i]] + values[i]
                ans = max(ans,x)
        return ans
    q = len(vq)
    for i in range(q):
        x = solve(vq[i],lq[i],values,weights,dp)
        print(x)
       
n = int(readline())
stdin = np.array(read().split(),np.int32)
v = np.zeros(n+1,np.int32)
w = np.zeros(n+1,np.int32)
v[1:] = stdin[:2*n:2]
w[1:] = stdin[1:2*n:2]
query = stdin[2*n+1:]
vq = query[::2]
lq = query[1::2]

main(n,v,w,vq,lq)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
n = int(readline())
stdin = list(map(int,read().split()))
v = [0]+stdin[:2*n:2]
w = [0]+stdin[1:2*n:2]
q = stdin[2*n]
query = stdin[2*n+1:]
k = 0
num = 1
while num < n:
    k += 1
    num *= 2
prev = k//2
remain = k-k//2
dp = [[0]*(10**5+1)]
for i in range(1,2**prev+1):
    vi = v[i]
    wi = w[i]
    dp.append(dp[i//2][:])
    for j in range(wi,10**5+1):
        dp[i][j] = max(dp[i][j],dp[i//2][j-wi]+vi)
for i in range(q):
    vq,lq = query[i*2],query[i*2+1]
    if vq <= 2**prev:
        print(dp[vq][lq])
    else:
        ans = 0
        for j in range(2**remain):
            cur = vq
            curw = 0
            curv = 0
            while cur > 2**prev:
                if j & 1:
                    curv += v[cur]
                    curw += w[cur]
                cur //= 2
                j >>= 1
            if curw <= lq:
                ans = max(ans,curv+dp[cur][lq-curw])
        print(ans)

Fixed submission:
import numpy as np
import sys
from numba import njit
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

@njit('(i4,i4[:],i4[:])',cache=True)
def precompute(n,v,w):
    dp = np.zeros((1024,10**5+1),np.int32)
    for i in range(1,min(1024,n+1)):
        vi = v[i]
        wi = w[i]
        p = i//2
        dp[i]=dp[p]
        for j in range(wi,10**5+1):
            dp[i][j] = max(dp[i][j],dp[p][j-wi]+vi)
    return dp

@njit('(i4,i4[:],i4[:],i4[:],i4[:])',cache=True)
def main(n,v,w,vq,lq):
    dp = precompute(n,v,w)
    values = np.empty(1024,np.int32)
    weights = np.empty(1024,np.int32)

    def solve(V,L,values,weights,dp):
        if V < 1024:
            return dp[V][L]
        values[0] = 0
        weights[0] = 0
        p = 0
        while V >= 1024:
            for j in range(1 << p):
                values[j + (1 << p)] = values[j]+ v[V]
                weights[j + (1 << p)] = weights[j] + w[V]
            p += 1
            V >>= 1
        ans = 0
        for i in range(1 << p):
            if weights[i] <= L:
                x = dp[V][L-weights[i]] + values[i]
                ans = max(ans,x)
        return ans
    q = len(vq)
    for i in range(q):
        x = solve(vq[i],lq[i],values,weights,dp)
        print(x)
       
n = int(readline())
stdin = np.array(read().split(),np.int32)
v = np.zeros(n+1,np.int32)
w = np.zeros(n+1,np.int32)
v[1:] = stdin[:2*n:2]
w[1:] = stdin[1:2*n:2]
query = stdin[2*n+1:]
vq = query[::2]
lq = query[1::2]

main(n,v,w,vq,lq)