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: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            var input = Console.ReadLine().Split().Select(int.Parse).ToArray();

            int total = 0;
            Dictionary<int, int> numdict = new Dictionary<int, int> { };

            for (int i = 0; i < n; i++)
            {
                int thisnum = input[i];
                total += thisnum;
                if (numdict.ContainsKey(thisnum))
                    numdict[thisnum]++;
                else
                    numdict.Add(thisnum, 1);
            }

            int q = int.Parse(Console.ReadLine());

            var b = new int[q];
            var c = new int[q];

            for (int i = 0; i < q; i++)
            {
                var input1 = Console.ReadLine().Split().Select(int.Parse).ToArray();
                b[i] = input1[0];
                c[i] = input1[1];
            }

            for (int i = 0; i < q; i++)
            {
                if (numdict.ContainsKey(b[i]))
                {
                    if (numdict.ContainsKey(c[i]))
                    {
                        total += numdict[b[i]] * (c[i] - b[i]);
                        numdict[c[i]] += numdict[b[i]];
                        numdict.Remove(b[i]);
                    }
                    else
                    {
                        total += numdict[b[i]] * (c[i] - b[i]);
                        numdict.Add(c[i], numdict[b[i]]);
                        numdict.Remove(b[i]);
                    }
                }
                Console.WriteLine(total);
            }

        }

    }
}