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: Accepted)

#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
#define int ll
#define db(x) cout<<#x<<" = "<<x<<"\n";
#define FIN ios::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define ALL(a) a.begin(),a.end()
#define mset(a,b) memset(a,b,sizeof(a));


 main() 
{
	FIN;
	int n;
	cin>>n;
	
	int arr[n];
	int sum=0;
	unordered_map<int,int> m;
	
	for(int i=0;i<n;i++)
	{
	    cin>>arr[i];
	    m[arr[i]]++;
	    sum=sum+arr[i];
	}
	int q;
	cin>>q;
	for(int i=0;i<q;i++)
	{
	    int a,b;
	    cin>>a>>b;
	    if(m[a]!=0)
	    {
	       // int value=m[a];
	        sum=sum-m[a]*a;
	        sum=sum+m[a]*b;
	        cout<<sum<<endl;
	        m[b]=m[b]+m[a];
	        m[a]=0;
	    }
	    else
	    cout<<sum<<endl;
	}


}