Under normal circumstances
Common time complexity: from small to big time
O (1) <O (log n) <O (n) <O (nlog n) <O (n-th power of 2) <O (n 3 th) <O (2n) <O (n!) <O (n power of n)
O (1) <O (log n) <O (n) <O (nlog n) <O (n-th power of 2) <O (n 3 th) <O (2n) <O (n!) <O (n power of n)