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.Linq;
using System.Text;

namespace _171_d
{
    internal class Replacing
    {
        private static void Main(string[] args)
        {
            // N
            var n = int.Parse(Console.ReadLine() ?? throw new InvalidOperationException());

            // A
            var sb = new StringBuilder();
            while (true)
            {
                var ch = Convert.ToChar(Console.Read());
                sb.Append(ch);
                if (ch == '\n') break;
            }
            var array = sb.ToString().Split(" ").Select(int.Parse).ToArray();

            var a = new Dictionary<int, long>();
            long sum = 0;
            foreach (var data in array)
            {
                if (a.ContainsKey(data))
                {
                    a[data]++;
                }
                else
                {
                    a.Add(data, 1);
                }
                sum += data;
            }
            
            // Q
            var q = int.Parse(Console.ReadLine() ?? throw new InvalidOperationException());

            // B C
            for (var i = 0; i < q; i++)
            {
                var bcLine = Console.ReadLine()?.Split(" ").Select(int.Parse).ToArray();
                if (bcLine == null) return;
                var b = bcLine[0];
                var c = bcLine[1];

                if (b != c && a.ContainsKey(b))
                {
                    var value = a[b];
                    if (a.ContainsKey(c))
                    {
                        a[c] += value;
                    }
                    else
                    {
                        a.Add(c, value);
                    }

                    sum += (c - b) * value;
                    a.Remove(b);
                }

                Console.WriteLine(sum);
            }
        }
    }
}