Aurora Saturday 14:30 Python Homework 20.03.28.

01 Apr Aurora Saturday 14:30 Python Homework 20.03.28.

Question 1：

You and your friend have come up with a way to send messages back and forth.

Your friend can encode a message to you by writing down a positive integer N and a symbol. You can decode that message by writing out that symbol N times in a row on one line.

Given a message that your friend has encoded, decode it.

Input Specification(please follow the input specification exactly!!)
The first line of input contains L, the number of lines in the message.
The next L lines each contain one positive integer less than 80, followed by one space, followed by a (non-space) character.

Output Specification(please follow the output specification exactly!!)
The output should be L lines long. Each line should contain the decoding of the corresponding line of the input. Specifically, if line i + 1 of the input contained N x, then line i of the output should contain just the character x printed N times.

Sample Input
4
9 +
3 –
12 A
2 X

Output for Sample Input
+++++++++
---
AAAAAAAAAAAA
XX

Question 2:

You supervise a small parking lot which has N 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 N (1 ≤ N ≤ 100). The second and third lines of input contain N 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 2N 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..

Output for Sample Input 1:
1

Explanation of Output for Sample Input 1:
Only the second parking space from the left was occupied yesterday and today.

Sample Input 2:
7
CCCCCCC
C.C.C.C

Output for Sample Input 2:
4

Explanation of Output for Sample Input 2:
The first, third, fifth, and seventh parking spaces were occupied yesterday and today