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Author: KirilMadzharov

5. While Loop/1. Lab/01. Read Text.py

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+"""
+Write a program that reads text from the console (string)
+ and prints it until it receives the "Stop" command.
+"""
+
+
+text = input()
+
+while text != 'Stop':
+    print(text)
+    text = input()

5. While Loop/1. Lab/02. Password.py

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+"""
+Write a program that initially reads a user profile name and password.
+It then reads a login password.
+
+• when entering a wrong password: prompt the user to enter a new password.
+• when entering a correct password: we print "Welcome {username}!".
+"""
+
+
+user = input()
+password = input()
+data = input()
+
+while data != password:
+    data = input()
+
+print(f"Welcome {user}!")

5. While Loop/1. Lab/03. Sum Numbers.py

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+"""
+Write a program that reads an integer from the console
+and on each successive line integers until their sum is
+ greater than or equal to the original number.
+
+After reading is complete, print the sum of the entered  numbers.
+"""
+
+
+number = int(input())
+
+sum_num = 0
+
+while sum_num < number:
+    sum_text = int(input())
+    sum_num += sum_text
+
+print(sum_num)

5. While Loop/1. Lab/04. Sequence 2k+1.py

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+"""
+Write a program that reads a number n entered by the user
+and prints all numbers ≤ n from the sequence: 1, 3, 7, 15, 31, ….
+
+Each subsequent number is calculated by multiplying
+the previous one by 2 and adding 1.
+"""
+
+
+
+number = int(input())
+
+sum_num = 1
+
+while sum_num <= number:
+    print(sum_num)
+    sum_num = sum_num * 2 + 1

5. While Loop/1. Lab/05. Account Balance.py

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+"""
+Write a program that calculates how much total money is in
+the account after you make a certain number of deposits.
+
+ On each line you will receive the amount you need to deposit
+ into the account until you receive a "NoMoreMoney" command.
+
+ For each amount received, the console should display
+ "Increase: " + the amount and add it to the account.
+
+ If you get a number less than 0 the console should display
+
+ "Invalid operation!" and the program to end.
+
+When the program ends, it should print
+
+"Total: " + the total amount in the account
+
+formatted to the second decimal place.
+"""
+
+
+money = input()
+current_sum = 0
+
+while money != "NoMoreMoney":
+    if float(money) < 0:
+        print("Invalid operation!")
+        break
+
+    print(f"Increase: {float(money):.2f}")
+    current_sum += float(money)
+    money = input()
+
+print(f"Total: {current_sum:.2f}")

5. While Loop/1. Lab/06. Max Number.py

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+"""
+Write a program that, until the
+"Stop" command is received, reads integers
+entered by the user, finds the largest among them,
+and prints it. Enter one number per line.
+"""
+
+
+import sys
+
+number = input()
+max_num = - sys.maxsize
+
+while number != "Stop":
+    num = int(number)
+
+    if num > max_num:
+        max_num = num
+
+    number = input()
+
+print(max_num)
+

5. While Loop/1. Lab/07. Min Number.py

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+"""
+Write a program that, until receiving the "Stop"
+ command, reads integers entered by the user,
+ finds the smallest among them, and prints it.
+
+Enter one number per line.
+"""
+
+
+import sys
+
+number = input()
+min_num = sys.maxsize
+
+while number != "Stop":
+    num = int(number)
+
+    if num < min_num:
+        min_num = num
+
+    number = input()
+
+print(min_num)
+

5. While Loop/1. Lab/08. Graduation.py

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+"""
+Write a program that calculates the grade point average of a student over his entire course.
+
+On the first line, you will get the student's name, and on each subsequent line,
+their annual grades. The student advances to the next grade if his annual grade is
+greater than or equal to 4.00. If the student is interrupted more than once,
+the student is expelled and the program ends, printing the name of the student and
+ the class in which he was expelled.
+
+  On successful completion of 12th grade to print:
+
+"{student name} graduated. Average grade: {the average grade of the entire study}"
+
+In case the student is excluded from school, print:
+"{student name} has been excluded at {grade in which he was excluded} grade"
+
+The value must be formatted to the second decimal place.
+"""
+
+
+
+student_name = input()
+
+current_class = 1
+total_grade = 0
+fail = 0
+
+is_excluded = False
+
+while current_class <= 12:
+    current_grade = float(input())
+
+    if current_grade < 4:
+        fail += 1
+        if fail > 1:
+            is_excluded = True
+            break
+
+    else:
+        current_class += 1
+        total_grade += current_grade
+
+if is_excluded:
+    print(f"{student_name} has been excluded at {current_class} grade")
+else:
+    average_grade = total_grade / 12
+    print(f"{student_name} graduated. Average grade: {average_grade:.2f}")

5. While Loop/2. Exercise/01. Old Books.py

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+"""
+Annie goes to her hometown after a very long period outside the country.
+On her way home, she sees her grandmother's old library and remembers her favorite book.
+Help Annie by writing a program in which she enters the book (text) she is looking for.
+Until Annie finds her favorite book or checks out all the books in the library,
+the program must read each time on a new line the name of each subsequent
+book (text) she checks out. The books in the library are out of stock once you get
+the "No More Books" text.
+
+• If it does not find the requested book to be printed on two lines:
+ "The book you are looking for is not here!"
+ "You checked {number} books."
+• If he finds his book, one line is printed:
+ "You checked {number} books and found it."
+"""
+
+
+book_title = input()
+book_from_shelf = input()
+
+checked_books = 0
+
+while book_title != book_from_shelf:
+    if book_from_shelf == "No More Books":
+        print("The book you search is not here!")
+        print(f"You checked {checked_books} books.")
+        break
+
+    checked_books += 1
+    book_from_shelf = input()
+
+else:
+    print(f"You checked {checked_books} books and found it.")

5. While Loop/2. Exercise/02. Exam Preparation.py

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+"""
+Write a program in which Marin solves exam problems until she receives an
+ "Enough" message from her lecturer. For each solved task he gets a grade.
+
+  The program should stop reading data on the command "Enough" or if Marin
+  receives the specified number of unsatisfactory marks.
+
+  Any score less than or equal to 4 is unsatisfactory.
+"""
+
+
+
+bad_grades = int(input())
+problem_title = input()
+grade_total = 0
+solved_problems = 0
+last_problem = ""
+bad_grade_count = 0
+
+while problem_title != "Enough":
+    grade = int(input())
+
+    grade_total += grade
+    solved_problems += 1
+    last_problem = problem_title
+
+    if grade <= 4:
+        bad_grade_count += 1
+        if bad_grade_count >= bad_grades:
+            print(f"You need a break, {bad_grade_count} poor grades.")
+            break
+
+    problem_title = input()
+
+else:
+    average_score = grade_total / solved_problems
+
+    print(f"Average score: {average_score:.2f}")
+    print(f"Number of problems: {solved_problems}")
+    print(f"Last problem: {last_problem}")
+

5. While Loop/2. Exercise/03. Vacation.py

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+"""
+Jessie has decided to raise money for a field trip and she wants you to help
+her find out if she will be able to raise the necessary amount.
+
+She saves or spends some of her money every day. If she wants to spend more
+ than her available money, she will spend as much as she has and she will have BGN 0 left.
+"""
+
+
+
+needed_money = float(input())
+available_money = float(input())
+days = 0
+days_spent = 0
+
+while available_money < needed_money:
+    action = input()
+    action_money = float(input())
+    days += 1
+    if action == "save":
+        available_money += action_money
+        days_spent = 0
+    else:
+        available_money -= action_money
+        if available_money < 0:
+            available_money = 0
+        days_spent += 1
+        if days_spent == 5:
+            print("You can't save the money.")
+            print(days)
+            break
+else:
+    print(f"You saved the money for {days} days.")
+

5. While Loop/2. Exercise/04. Walking.py

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+"""
+Gabby wants to start a healthy lifestyle and has set a goal of walking 10,000 steps every day.
+Some days, however, she is very tired from work and will want to go home before she achieves her goal.
+
+Write a program that reads from the console how many steps she takes each time she goes out during the day,
+and when she reaches her goal it says
+
+"Goal reached! Good job!" and how many more steps did "{difference between steps} steps over the goal!"
+
+If she wants to go home before then, she will enter the command "Going home" and enter the steps she took
+on her way home. After which, if she failed to reach her goal, the console should read:
+
+"{difference between steps} more steps to reach goal."
+"""
+
+
+
+input_line = input()
+steps_count = 0
+
+while input_line != "Going home":
+    steps = int(input_line)
+    steps_count += steps
+    if steps_count >= 10000:
+        break
+
+    input_line = input()
+
+if input_line == "Going home":
+    steps_home = int(input())
+    steps_count += steps_home
+
+diff = abs(10000 - steps_count)
+
+if steps_count >= 10000:
+    print("Goal reached! Good job!")
+    print(f"{diff} steps over the goal!")
+else:
+    print(f"{diff} more steps to reach goal.")
+

5. While Loop/2. Exercise/05. Coins.py

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+"""
+Vending machine manufacturers wanted to make their machines return as little change as possible.
+Write a program that takes an amount - the change to be returned and calculates the least number
+of coins that can be returned.
+"""
+
+
+
+change = float(input())
+coins_change = round(change * 100)
+
+count_coins = 0
+
+while coins_change > 0:
+    if coins_change >= 200:
+        coins_change -= 200
+    elif coins_change >= 100:
+        coins_change -= 100
+    elif coins_change >= 50:
+        coins_change -= 50
+    elif coins_change >= 20:
+        coins_change -= 20
+    elif coins_change >= 10:
+        coins_change -= 10
+    elif coins_change >= 5:
+        coins_change -= 5
+    elif coins_change >= 2:
+        coins_change -= 2
+    elif coins_change >= 1:
+        coins_change -= 1
+    count_coins += 1
+
+print(count_coins)
+