Project Euler Forum

I am having an issue with the problem 769 link : https://projecteuler.net/problem=679


The value for f(n) when n = 15, as suggested in the problem statement is 72863 but the total number of words that I am getting is 73313 after performing the suggested operations like generating a word of length 15 form given 4 letters, eliminating the duplicates and confirming that the given keywords occur only once in the given word.

Have you checked overlapping occurances?
"arearea"

I don't know what you mean by "eliminating the duplicates". What duplicates?

If I

• List all 15-letter words
• Count the number of occurrences of each keyword in each word, including overlapping occurrences as v6ph1 points out
• Delete the words that don't have exactly one occurrence of each keyword

then I'm left with 72863 words. If that's the process you're following, and you get a different number, then you've got a bug in your code.