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 (GCC 9.2.1) (judge verdict: Wrong Answer)

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
  int n;
  scanf("%d", &n);
  
  int* array = malloc(n * sizeof(int));
  int* countArray = malloc(n * sizeof(int));
  int size = 0;
  int i, j;
  int count = 0;
  for (i = 0; i < n; ++i)
  {
    int temp;
    scanf("%d", &temp);
    count += temp;
    
    int flag = 0;
    for (j = 0; j < size; ++j)
    {
      if (temp == array[j])
      {
        flag = 1;
        ++countArray[j];
        break;
      }
    }
    
    if (flag)
    {
      continue;
    }
    array[size] = temp;
    countArray[size++] = 1;
  }
  
  int q, b, c;
  scanf("%d", &q);
  for (i = 0; i < q; ++i)
  {
    scanf("%d %d", &b, &c);
    for (j = 0; j < size; ++j)
    {
      if (array[j] == b)
      {
        array[j] = c;
        count += (c - b) * countArray[j];
        break;
      }
    }
    printf("%d\n", count);
  }
  
  free(array);
  free(countArray);
  
  return 0;
}