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E - Combination Lock
Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d
& %I64u
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Description

Scrooge McDuck keeps his most treasured savings in a home safe with a combination lock. Each time he wants to put there the treasures that he's earned fair and square, he has to open the lock.



The combination lock is represented by n rotating disks with digits from 0 to 9 written on them. Scrooge McDuck has to turn some disks so that the combination of digits on the disks forms a
secret combination. In one move, he can rotate one disk one digit forwards or backwards. In particular, in one move he can go from digit 0 to digit 9 and vice versa. What minimum number of actions does he need for that?

Input

The first line contains a single integer n (1 ≤ n ≤ 1000) — the number of disks on the combination lock.

The second line contains a string of n digits — the original state of the disks.

The third line contains a string of n digits — Scrooge McDuck's combination that opens the lock.

Output

Print a single integer — the minimum number of moves Scrooge McDuck needs to open the lock.

Sample Input

Input

5
82195
64723

Output

13

Hint

In the sample he needs 13 moves:

1 disk: 


2 disk: 


3 disk: 


4 disk: 


5 disk: 

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
int n;
char a[1100];
char b[1100];
int flag= 0 ;
cin >> n;
for (int i=0; i<n; i++)
cin >> a[i];
for (int j=0; j<n; j++)
cin >> b[j];
int num = 0;
for (int i=0; i<n; i++)
{
int p1 = (int)a[i]-48;
int p2 = (int)b[i]-48;
int p = p1-p2;
flag = abs(p);
if (flag>5)
flag = 10-flag;
num = num +flag;
}
cout << num << endl;
return 0;
}