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 Ruby (2.7.1) (judge verdict: Runtime Error)

n = gets.chomp.to_i
raw_as = gets.chomp.split.map(&:to_i)
Q = gets.chomp.to_i
bs = []
cs = []
ss = []
Q.times do
  b, c= gets.chomp.split.map(&:to_i)
  bs << b; cs << c
end

a_sum = raw_as.inject(:+)
as = {}
raw_as.each do |a|
  as[a] ||= 0
  as[a] += 1
end

  puts "arr: #{as}"
bs.each_with_index do |bi, i|
  puts "#{bi} => #{cs[i]}, #{as[bi].nil?}"
  puts "::(#{cs[i]} - #{bi}) * #{as[bi]}"
  a_sum += as[bi].nil? ? 0 : ((cs[i] - bi) * as[bi])
  ss <<  a_sum
  as[cs[i]] ||= 0
  as[cs[i]] += as[bi]
  as[bi] = 0
  puts "arr: #{as}"
  puts "as[cs[i]]:#{as[cs[i]]}, as[bi]: #{as[bi]}"
end

puts ss