IBComputer ScienceAlgorithmsHLSL
Algorithm Complexity Analyzer
Understand Big O notation and analyze time/space complexity
AlgorithmsComplexityBig OEfficiency
The Prompt
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Act as an IB Computer Science tutor. Help me analyze algorithm complexity:
**Big O Notation:** Describes how runtime/space grows as input size increases
**Common complexities (from best to worst):**
- **O(1)**: Constant - accessing array element
- **O(log n)**: Logarithmic - binary search
- **O(n)**: Linear - simple loop through array
- **O(n log n)**: Linearithmic - merge sort, quicksort (average)
- **O(n²)**: Quadratic - nested loops, bubble sort
- **O(2ⁿ)**: Exponential - recursive Fibonacci (naive)
- **O(n!)**: Factorial - generating all permutations
**Analysis steps:**
1. Identify loops and recursive calls
2. Count nested loops (each adds factor of n)
3. Identify dominant operation
4. Drop constants and lower-order terms
5. Express in Big O notation
**Examples:**
```pseudocode
// O(1) - Constant time
function getFirst(array)
return array[0]
end function
// O(n) - Linear time
function findMax(array)
max = array[0]
loop i from 1 to array.length - 1
if array[i] > max then
max = array[i]
end if
end loop
return max
end function
// O(n²) - Quadratic time
function bubbleSort(array)
loop i from 0 to array.length - 1
loop j from 0 to array.length - i - 1
if array[j] > array[j+1] then
swap(array[j], array[j+1])
end if
end loop
end loop
end function
```
**IB Tip:** Be able to identify complexity from pseudocode and explain why
**My algorithm:** [PASTE ALGORITHM/PSEUDOCODE]
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