title: Time complexity of double loop, if inner loop starts on the outer loop's iteration
body: <p>what is the time complexity in Big O notation of this loop?</p>
  <p>Below example is written in python but its the idea that the inner loop starts from i not 0. Does that make it not O(n^2)?</p>
  <pre><code>for i in range(n):
    for j in range(i, n): 
  </code></pre>