##### Canadian Computing Competition: 2018 Stage 1, Junior #2

You supervise a small parking lot which has parking spaces.

Yesterday, you recorded which parking spaces were occupied by cars and which were empty.

Today, you recorded the same information.

How many of the parking spaces were occupied both yesterday and today?

#### Input Specification

The first line of input contains the integer . The second and third lines of input contain characters each. The second line of input records the information about yesterday's parking spaces, and the third line of input records the information about today's parking spaces. Each of these characters will either be `C`

to indicate an occupied space or `.`

to indicate it was
an empty parking space.

#### Output Specification

Output the number of parking spaces which were occupied yesterday and today.

#### Sample Input 1

```
5
CC..C
.CC..
```

#### Sample Output 1

`1`

#### Explanation for Sample Output 1

Only the second parking space from the left was occupied yesterday and today.

#### Sample Input 2

```
7
CCCCCCC
C.C.C.C
```

#### Sample Output 2

`4`

#### Explanation for Sample Output 2

The first, third, fifth, and seventh parking spaces were occupied yesterday and today.

## Comments

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You need to input N. You’re skipping right to the strings

Quick question, I used python to solve this, was the N or the Line 1 input even needed? It was throwing me off because I wasn't sure how to utilize it in the problem. Just want to know if it was used in other languages.

No, it technically was not needed; implementations that utilize

`N`

would use it instead of checking for the length of the string (e.g. replacing`len(yesterday)`

with`N`

in your code). Hope that helps.Also, in the future, you can ask questions in the DMOJ Discord.

Wait if the questions about problems are for the discord and not the comments, then what are the comments for?

I am confused about the second output. Shouldn't be 3?

count the common Cs at the same indexes of the two strings.

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Read the output specification again. Output the number of parking spaces which were occupied yesterday and today. I think you are thinking to count how many parking spots were occupied yesterday and today combined.

oh! yes i thought that only! and that was the reason why my code was wrong too