Dynamic Programming for Coding Interviews: A Bottom-Up approach to problem solvingКНИГИ » ПРОГРАММИНГ
Название: Dynamic Programming for Coding Interviews: A Bottom-Up approach to problem solving Автор: Kamal Rawat, Meenakshi Издательство: Notion Press Год: 2017 Страниц: 142 Формат: PDF, EPUB, MOBI Размер: 77 Mb Язык: English
I wanted to compute 80th term of the Fibonacci series. I wrote the rampant recursive function,
int fib(int n){
return (1==n || 2==n) ? 1 : fib(n-1) + fib(n-2);
}
and waited for the result. I wait… and wait… and wait…
With an 8GB RAM and an Intel i5 CPU, why is it taking so long? I terminated the process and tried computing the 40th term. It took about a second. I put a check and was shocked to find that the above recursive function was called 204,668,309 times while computing the 40th term.
More than 200 million times? Is it reporting function calls or scam of some government?
The Dynamic Programming solution computes 100th Fibonacci term in less than fraction of a second, with a single function call, taking linear time and constant extra memory.
A recursive solution, usually, neither pass all test cases in a coding competition, nor does it impress the interviewer in an interview of company like Google, Microsoft, etc.
The most difficult questions asked in competitions and interviews, are from dynamic programming. This book takes Dynamic Programming head-on. It first explain the concepts with simple examples and then deep dives into complex DP problems.
Уважаемый посетитель, Вы зашли на сайт как незарегистрированный пользователь.
С этой публикацией часто скачивают:
Computing in C ++. An introduction to C Название: Computing in C ++. An introduction to C Автор: Robert N?rnberg Издательство: Imperial College London Год: 2014 Формат: pdf Страниц: 52...
Introduction to Python: 2018 Edition Название: Python for Beginners: 2018 Edition: Learn to Code with Python! Автор: Mark Lassoff, Julius Hernandez Год: 2018 Страниц: 220 Формат: EPUB,...
Pro SQL Server Wait Statistics Название: Pro SQL Server Wait Statistics Автор: Enrico van de Laar Издательство: Apress ISBN: 1484211405 Год: 2015 Страниц: 336 Язык: английский...
Навигация
Вход на сайт
Реклама
Dynamic Programming for Coding Interviews: A Bottom-Up approach to problem solving 
