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: Wrong Answer)

package main

import "fmt"
import "bufio"
import "os"
import "strconv"

var sc = bufio.NewScanner(os.Stdin)

func nextInt() int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return i
}

func twoInt() (int, int) {
	var a, b int
	fmt.Scan(&a, &b)
	return a, b
}

func main() {
	var N int
	fmt.Scan(&N)

	A := make([]int, N)
	sc.Split(bufio.ScanWords)

	for i := 0; i < N; i++ {
		A[i] = nextInt()
	}

	var Q int
	fmt.Scan(&Q)

	B := make([]int, Q)
	C := make([]int, Q)

	S := make([]int64, Q)

	for i := 0; i < Q; i++ {
		B[i], C[i] = twoInt()
	}

	var tmpB, tmpC int
	var tmpS int64
	for i := 0; i < Q; i++ {
		tmpB = B[i]
		tmpC = C[i]
		for j := 0; j < N; j++ {
			if A[j] == tmpB {
				A[j] = tmpC
			}
		}

		tmpS = 0
		for k := 0; k < N; k++ {
			tmpS = tmpS + int64(A[k])
		}

		S[i] = tmpS

	}

	for i := 0; i < Q; i++ {
		fmt.Println(S[i])
	}

}