/*
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀       ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀           ⢀⣠⡯⠀⠀⠀⢠⡐⠀⠀⠀⠀⠀
⠀⠀⠀⢀⣤⠔⠂⠀⠀⠀⢤⣤⣤⣤⣄⣀⣀⣀⣀⡀⠀⢀⣀⣀⣀⡀⠀⠀⠀⢀⢀⣀⣠⣤⣴⣶⣾⠉⠉⠙⣶⠂⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀   ⠀⣰⣿⡟⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠰⣿⣷⣾⣿⣷⣴⣶⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠏⠉⠛⢿⣿⣿⣿⣿⣿⣿⣿⠿⠿⣿⣶⣿⣿⣿⣿⣤⣂⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣠⣤⣤⣤⣴⣦⣾⣿⣿⣿⣶⣦⣴⣶⣶⠀
⠀⠀⠀⣿⣿⣿⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣤⣶⣶⣿⣿⣿⣿⣿⣿⣿⣯⣤⣤⣿⡿⠿⠿⠿⠛⠛⠛⠛⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣽⣿⣿⡟⢻⣿⣿⣿⡟⣿⣿⣿⣿⠉⠉⠁⠀
⠀⠀⠀⣹⣟⣿⣦⠈⠻⠋⢉⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣾⣿⣿⣿⣠⣾⣿⣿⣏⣤⣾⣿⣿⣿⡆⠀
⠀⠀⢀⣿⣿⣿⣿⣦⠀⠘⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠟⢿⣿⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡧⠀
⠀⠀⢸⣿⣿⣿⣿⣿⡀⢀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⡈⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⡿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠛⡄⠀
⠀⠀⠈⠿⠿⠁⣿⣿⣿⠎⠻⣯⠉⠉⠉⠈⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⢹⣿⢻⠉⠉⠁⠈⠻⢦⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⠁⠉⠙⠛⠛⢿⣿⠟⠋⠁⠀⠀⠀⠈⠀
⠀⠀⠀⠀⠀⠀⢹⣿⡟⠀⠀⠈⠳⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢿⠞⠀⠀⠀⠀⠀⠀⠙⠳⠤⠤⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀    ⠀⠀⠀⠁⠀⠀⠀⠀⠀⠸⣿⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⠀
⠀⠀⠀⠀⠀⠀⢈⡟⠇⠀⠀⠀⠀⠈⠁⠤⠤⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣶⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀     ⠀⠀⠀⢹⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠙⠀⠈⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⠂⠀⠀⠀⠀  ⠀⠀⠀⠀⠀⠀⠀⠀                             ⠀⠀⡘⡀⠀
                                         ⠀⠀⠀⠀⠀⠀                         ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
*/
#include <iostream>
#include <string>
#include <sstream>
#include <cmath>
#include <memory.h>
#include <algorithm>
#include <stack>
#include <deque>
#include <iomanip>
#include <stdio.h>
#include <queue>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <ctime>
#include <cstdlib>
#include <cassert>
#include <iterator>
#include <chrono>
#include <array>
#include <bitset>
#define int long long
#define itn long long
#define fro for
#define intt __int128
#define pii pair <int, int>
#define debug(x) cerr << (#x) << " " << (x) << endl
#define pb push_back
#define all(vc) vc.begin(), vc.end()
#define fir first
#define sec second
#define endl "\n"
#define un unsigned
#define INF 1000000010
#define double long double
using namespace std;

const int N = 100005, R = 1 << 20, ABC = 26, logn = 20;
const int BUBEN = 1001;

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

vector<vector<int>> up(N, vector<int>(logn));
vector<vector<int>> mn(N, vector<int>(logn, INF));
vector<int> d(N);

int minn(int a, int b) {
    if (d[a] < d[b])
        swap(a, b);
    int ans = INF;
    for (int i = logn - 1; i >= 0; i--) {
        int pa = up[a][i];
        if (d[pa] > d[b]) {
            ans = min(ans, mn[a][i]);
            a = pa;
        }
    }
    if (d[a] > d[b]) {
        ans = min(ans, mn[a][0]);
        a = up[a][0];
    }

    if (a == b)
        return ans;
    for (int i = logn - 1; i >= 0; i--) {
        int pa = up[a][i], pb = up[b][i];
        if (pa != pb) {
            ans = min(ans, min(mn[a][i], mn[b][i]));
            a = pa;
            b = pb;
        }
    }
    return min(ans, min(mn[a][0], mn[b][0]));
}

void dfs(vector<vector<int>>& gr, vector<int>& cost, int v, int pr) {
    d[v] = d[pr] + 1;
    up[v][0] = pr;
    mn[v][0] = cost[v];
    for (int i = 1; i < logn; i++) {
        up[v][i] = up[up[v][i - 1]][i - 1];
        mn[v][i] = min(mn[up[v][i - 1]][i - 1], mn[v][i - 1]);
    }

    for (int u : gr[v]) {
        if (pr != u)
            dfs(gr, cost, u, v);
    }
}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    srand(time(0));
    cout.precision(17);

    int n;
    cin >> n;

    vector<vector<int>> gr(n + 1);
    vector<int> cost(n + 1);
    for (int i = 2; i <= n; i++) {
        int a, b;
        cin >> a >> b;
        gr[a].pb(i);
        cost[i] = b;
    }

    dfs(gr, cost, 1, 1);

    int q;
    cin >> q;

    while (q--) {
        int a, b;
        cin >> a >> b;

        cout << minn(a, b) << endl;
    }
    return 0;
}