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# (Mono-mcs 6.8.0.105) (judge verdict: Runtime Error)

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

namespace CodeForcesPractice
{
    class Program
    {
        //public static string[] SplitInput(string Line,int NumParam)
        //{
        //    string[] RetArr = new string[NumParam];
        //    RetArr = Line.Split(' ');
        //    return RetArr;
        //}
        public static int[] IntInput(string Line, int NumParam)
        {
            string[] RetArr = new string[NumParam];
            RetArr = Line.Split(' ');
            int[] arr = new int[NumParam];
            for (int i = 0; i < NumParam; i++)
            {
                arr[i] = Convert.ToInt32(RetArr[i]);
            }
            return arr;
        }
        
        public static void Replacing()
        {
            int arrLen = Convert.ToInt16(Console.ReadLine());
            int[] nums = IntInput(Console.ReadLine(), arrLen);
            int cases = Convert.ToInt16(Console.ReadLine());
            int l = nums.Length;
            for (int i = 0; i < cases; i++) {
                Int64 sum = 0;
                int[] arr2 = new int [l];
                Array.Copy(nums, arr2,l);
                int[] arr = IntInput(Console.ReadLine(), 2);
                int j = arr[0];
                int k = arr[1];
                for (int q = 0; q < l; q++)
                {
                    if (arr2[q] == j) { arr2[q] = k; }
                    sum += arr2[q];
                }
                Console.WriteLine(sum);
            }
        }
        static void Main(string[] args)
        {
            Replacing();
            Console.ReadLine();
        }
    }
}