diff --git a/.gitignore b/.gitignore index 2f78cf5..cbf0fa6 100644 --- a/.gitignore +++ b/.gitignore @@ -1,2 +1,2 @@ *.pyc - +*.sw* diff --git a/e_7.py b/e_7.py index 4374c60..806db4c 100755 --- a/e_7.py +++ b/e_7.py @@ -12,16 +12,23 @@ """ def prime_list(value): """ - Returns the vlst prime number + Returns the value of the 10001st prime number """ + prime_list = [2] + curr_val = 3 + ptr = False + while( len(prime_list) < value): + for primes in prime_list: + if (curr_val % primes == 0): + ptr = True # multiple of at least one value + if not ptr: + prime_list.append(curr_val) - return 1 - - - + curr_val +=1 + ptr = False + return prime_list[-1] if __name__ == '__main__': val = 10001 print "Answer : %d " % (prime_list(val)) - diff --git a/e_8.py b/e_8.py new file mode 100755 index 0000000..1bc7d1f --- /dev/null +++ b/e_8.py @@ -0,0 +1,59 @@ +#!/usr/bin/env python +""" +#--- + Julien Lengrand-Lambert + Created on : Wed Jan 11 14:42:54 CET 2012 + + DESCRIPTION : Solves problem 8 of Project Euler +Find the greatest product of five consecutive digits in the 1000-digit number. +73167176531330624919225119674426574742355349194934 +96983520312774506326239578318016984801869478851843 +85861560789112949495459501737958331952853208805511 +12540698747158523863050715693290963295227443043557 +66896648950445244523161731856403098711121722383113 +62229893423380308135336276614282806444486645238749 +30358907296290491560440772390713810515859307960866 +70172427121883998797908792274921901699720888093776 +65727333001053367881220235421809751254540594752243 +52584907711670556013604839586446706324415722155397 +53697817977846174064955149290862569321978468622482 +83972241375657056057490261407972968652414535100474 +82166370484403199890008895243450658541227588666881 +16427171479924442928230863465674813919123162824586 +17866458359124566529476545682848912883142607690042 +24219022671055626321111109370544217506941658960408 +07198403850962455444362981230987879927244284909188 +84580156166097919133875499200524063689912560717606 +05886116467109405077541002256983155200055935729725 +71636269561882670428252483600823257530420752963450 +#--- +""" +def greatest_product(data): + """ + Returns the greatest product of five consecutive digits in the input data. + """ + cons_list = [] + # print list of 5 consecutive digits + for j in range(len(data) - 4): + suite = data[j:j+5] + if is_consecutive(suite): + cons_list.append(suite) + + return 1 + +def is_consecutive(suite): + """ + Returns true if values in suite are consecutive and False otherwise + """ + cons = True + for k in range(len(suite) - 1): + if ((int(suite[k]) + 1) != int(suite[k + 1])): + cons = False + return cons + +if __name__ == '__main__': + # really bad way to present it + data = "7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450" + + #print data + print "Answer : %d " % (greatest_product(data))