Problem:
Score : 400 points

Problem Statement

You have a sequence A composed of N positive integers: A_{1}, A_{2}, \cdots, A_{N}.

You will now successively do the following Q operations:

In the i-th operation, you replace every element whose value is B_{i} with C_{i}.

For each i (1 \leq i \leq Q), find S_{i}: the sum of all elements in A just after the i-th operation.

Constraints

All values in input are integers.

1 \leq N, Q, A_{i}, B_{i}, C_{i} \leq 10^{5}

B_{i} \neq C_{i}

Input

Input is given from Standard Input in the following format:

N
A_{1} A_{2} \cdots A_{N}
Q
B_{1} C_{1}
B_{2} C_{2}
\vdots
B_{Q} C_{Q}

Output

Print Q integers S_{i} to Standard Output in the following format:

S_{1}
S_{2}
\vdots
S_{Q}

Note that S_{i} may not fit into a 32-bit integer.

Sample Input 1

4
1 2 3 4
3
1 2
3 4
2 4

Sample Output 1

11
12
16

Initially, the sequence A is 1,2,3,4.

After each operation, it becomes the following:

2, 2, 3, 4

2, 2, 4, 4

4, 4, 4, 4

Sample Input 2

4
1 1 1 1
3
1 2
2 1
3 5

Sample Output 2

8
4
4

Note that the sequence A may not contain an element whose value is B_{i}.

Sample Input 3

2
1 2
3
1 100
2 100
100 1000

Sample Output 3

102
200
2000

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading;

class Program
{
    static void Main(string[] args)
    {
        long[] arrAll = new long[1000000];
        arrAll = arrAll.Select(v => v = 0).ToArray();
        long n = long.Parse(Console.ReadLine());
        long[] arr = Console.ReadLine().Split(' ').Select(v => long.Parse(v)).ToArray();
        var list = new List<long>();
        long sum = arr.Sum();
        foreach (long ele in arr) arrAll[ele]++;
        long q = long.Parse(Console.ReadLine());
        for(long i = 1; i <= q; i++)
        {
            long[] qArr = Console.ReadLine().Split(' ').Select(v => long.Parse(v)).ToArray();
            long b = qArr[0];
            long c = qArr[1];
            long count = arrAll[b];
            sum = sum - count * b + count * c;
            arrAll[b] = 0;
            arrAll[c] = arrAll[c] + count;
            list.Add(sum);
        }
        foreach (long ele in list) Console.WriteLine(ele);



    }

    

}