DevOps Classroom notes 17/Apr/2025

Project euler 2

• Overview
• Lets solve fibonnaci sequence

a = 1
b = 2
say a
say b
max = 30
until (a + b) <= max
    c = a + b
    say c
    a = b
    b = c

• Now we need to find sum of even numbers

Hi Chaitra
a = 1
b = 2
sum = 2
max = 30
until (a + b) <= max
    c = a + b
    if c % 2 == 0
        sum = sum + c
    a = b
    b = c

Leap Year

• Lets make chaitra to tell if the year is leap or not
• Leap Year Rules
  • A year is a leap year if it is divisible by 4.
  • However, if the year is also divisible by 100, it is NOT a leap year, unless…
  • The year is divisible by 400, then it IS a leap year.
• Summary:

If year % 400 == 0 → Leap year

Else if year % 100 == 0 → Not a leap year

Else if year % 4 == 0 → Leap year

Else → Not a leap year

• inputs: year
• Solution

Hi Chaitra
year = 1904
leap_year = false
if year % 4 == 0
    if year % 100 == 0 and year % 400 == 0:
        leap_year = true
    if year % 100 != 0
        leap_year = true

say leap_year

Sum of digits

• Lets look at this problem

1530  => 1 + 5 + 3 = 9
7776  => 7 + 7 + 7 + 6 = 27 => 2 + 7 = 9
1827 => 1 + 8 + 2+ 7 = 18 => 1 + 8 => 9
7775 => 8
1234 = > 1

• Chaitra knows + - * / // % == != < > <= >=
• This problem involves two sub problems
  • pulling out individual digits
  • add all digits till the result is single digit
• pulling out individual digits

Hi Chaitra
number = 7776
result = 0
until number > 0
   digit = number % 10
   result = result + digit
   number = number // 10
   if number == 0 and result > 9:
      number = result
      result = 0
say result

System Setup

• Level 1 Softwares:
  • Git
  • Python 3.11
  • Visual Studio Code
• Level 2 Softwares: After creating cloud accounts
  • aws cli
  • azure cli
  • azure data studio