Description

To train the machine to predict the next user input, we need to collect data about the user. We will ask them to press 0's and 1's on the keyboard in an unpredictable order. These data will be kept in a string of the format 011100101010… Do not consider other characters. If a user makes a mistake and presses 2 instead of 1 or enters characters separated by commas, spaces or any other character — just exclude them from the input string.

Objectives

In this stage, your program should:

1. Store the value of the minimum length of a string of zeros and ones that the user must enter as a constant. Specify the minimum string length equal to 100 — this should allow you to collect enough statistics without taking too much of the user's time;
2. Ask a user to enter a random string of 0 and 1. Use this statement: Print a random string containing 0 or 1:;
3. Read user input and filter out inappropriate symbols from each user input. Remove all characters except 1 and 0. For example, if a user entered 1.0,1 120, then after filtering it should be 10110;
4. Append the processed string to the general string containing all the data from the inputs;
5. Keep asking the user for new input strings and appending them to the general string until the length of the general string is equal or exceeds 100. If it exceeds 100, don't remove extra 1 and 0: 100 symbols are the minimum required length, but the more data we have, the better;
6. Output the final data string.

Inform the user how many characters they have already entered, and how many are left, before asking to enter characters again. Use this pattern: Current data length is X, Y symbols left.

Example

The greater-than symbol followed by a space (> ) represents the user input. Note that it's not part of the input.

For simplicity, we will limit ourselves to a string of length 20 in this example.

Print a random string containing 0 or 1:

> 01000111001
Current data length is 11, 9 symbols left
Print a random string containing 0 or 1:

> 2345
Current data length is 11, 9 symbols left
Print a random string containing 0 or 1:

> 1010456
Current data length is 15, 5 symbols left
Print a random string containing 0 or 1:

> 0100010

Final data string:
0100011100110100100010