Complexities Classes:

1. constant complexities  O(1) (smaller time)
2. Logarithmic complexities  O(Logn)
3. Linear complexities  O(n)
4. Quadratic complexities O(n²)
5. Cubic complexities O(n³)
6. Polynomial complexities O(n^c) c is constant c>0
7. Exponential complexities  O(cⁿ) c>1 (larger time)

NOTE: time increasing from constant complexity to exponential complexity