#include <iostream>
#include <cstring>
#include <cstdio>
#include<cmath>
using namespace std;
const int N= 1e5+10;
typedef long long LL;

struct node{
    int l,r,dis,val,dad;
}heap[N<<2];

inline int max(const int &a,const int &b){
    return a>b?a:b;
}

inline
 
 void swap(int &a,int &b){
    a^=b^=a^=b;
}

inline int find(int &x){
    return heap[x].dad==x?x:heap[x].dad=find(heap[x].dad);
}


int merge(int x,int y){
    if(x==0) return y;
    if(y==0) return x;

    if(heap[x].val<heap[y].val) swap(x,y);

    heap[x].r = merge(heap[x].r,y);
    heap[heap[x].r].dad = x;

    if
 
(heap[heap[x].l].dis<heap[heap[x].r].dis) swap(heap[x].l,heap[x].r);

    if(heap[x].r==0) heap[x].dis = 0;
    else heap[x].dis = heap[heap[x].r].dis+1;

    return x;

}

inline int pop(int &x){
    int l = heap[x].l;
    int r = heap[x].r;

    heap[l].dad = l;
    heap[r].dad = r;

    heap[x].dis = heap[x].l = heap[x].r = 0
 
;

    return merge(l,r);
}

inline int push(int x,int y){
    return merge(x,y);
}
int main(){
    int num, que;
    while(scanf("%d",&num)==1){
        for(int i=1;i<=num;i++){
            scanf("%d",&heap[i].val);
            heap[i].l=heap[i].r=heap[i].dis=0;
            heap[i].dad= i ;
        }
        scanf("%d",&que);

        int a,b,x,y;

        while(que--){
            scanf("%d%d",&a,&b);
            x = find(a);
            y = find(b);

            if(x==y) puts("-1");
            else{
                heap[x].val/=2;
                int xx = pop(x);
                xx = push(xx,x);

                heap[y].val/=2;
                int yy = pop(y);
                yy = push(yy,y);

                int tmp = merge(yy,xx);
                printf("%d\n",heap[tmp].val);
            }
        }
    }

    return 0;
}