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 Go (1.14.1) (judge verdict: Time Limit Exceeded)

package main

import "fmt"

func main() {
	var n int
	fmt.Scanf("%d\n", &n)

	slice := make([]int, n)
	for i := 0; i < n; i++ {
		if i != n-1 {
			fmt.Scanf("%d", &slice[i])
		} else {
			fmt.Scanf("%d\n", &slice[i])
		}
	}

	var q, b, c int
	fmt.Scanf("%d\n", &q)
	out := make([]int, q)
	for i := 0; i < q; i++ {
		fmt.Scanf("%d %d\n", &b, &c)
		for j := 0; j < n; j++ {
			if slice[j] == b {
				slice[j] = c
			}
		}

		for _, j := range slice {
			out[i] += j
		}

	}

	for _, j := range out {
		fmt.Println(j)
	}

}