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pradntoday at 4:11 PM3 repliesview on HN

He came to give a lecture at UT Austin, where I did my undergrad. I had a chance to ask him a question: "what's the story behind inventing QuickSort?". He said something simple, like "first I thought of MergeSort, and then I thought of QuickSort" - as if it were just natural thought. He came across as a kind and humble person. Glad to have met one of the greats of the field!


Replies

sreantoday at 4:17 PM

Happy to meet you. I was there and I remember that question being asked. I think it was 2010.

If I remember correctly he had two immediate ideas, his first was bubble sort, the second turned out to be quicksort.

He was already very frail by then. Yet clarity of mind was undiminished. What came across in that talk, in addition to his technical material, was his humor and warmth.

gsanghanitoday at 4:17 PM

I remember this vividly! I believe he said that he thought of _Bubble Sort_ first, but that it was too slow, so he came up with QuickSort next

mceachentoday at 4:29 PM

He discusses this and his sixpence wager here: https://youtu.be/pJgKYn0lcno

(Source: TFA)