From 3a71d003ed19cea4dcf0ff21c2ce48ed4f531efc Mon Sep 17 00:00:00 2001 From: jpg-130 Date: Sat, 29 Jun 2019 14:06:22 +0530 Subject: [PATCH 1/2] adding sum of subsets --- dynamic_programming/sum_of_subset.py | 34 ++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 dynamic_programming/sum_of_subset.py diff --git a/dynamic_programming/sum_of_subset.py b/dynamic_programming/sum_of_subset.py new file mode 100644 index 000000000000..f6509a259c5d --- /dev/null +++ b/dynamic_programming/sum_of_subset.py @@ -0,0 +1,34 @@ +def isSumSubset(arr, arrLen, requiredSum): + + # a subset value says 1 if that subset sum can be formed else 0 + #initially no subsets can be formed hence False/0 + subset = ([[False for i in range(requiredSum + 1)] for i in range(arrLen + 1)]) + + #for each arr value, a sum of zero(0) can be formed by not taking any element hence True/1 + for i in range(arrLen + 1): + subset[i][0] = True + + #sum is not zero and set is empty then false + for i in range(1, requiredSum + 1): + subset[0][i] = False + + for i in range(1, arrLen + 1): + for j in range(1, requiredSum + 1): + if arr[i-1]>j: + subset[i][j] = subset[i-1][j] + if arr[i-1]<=j: + subset[i][j] = (subset[i-1][j] or subset[i-1][j-arr[i-1]]) + + #uncomment to print the subset + # for i in range(arrLen+1): + # print(subset[i]) + + return subset[arrLen][requiredSum] + +arr = [2, 4, 6, 8] +requiredSum = 5 +arrLen = len(arr) +if isSumSubset(arr, arrLen, requiredSum): + print("Found a subset with required sum") +else: + print("No subset with required sum") \ No newline at end of file From 340f561e65c815e743374c4e296f58badebf5d67 Mon Sep 17 00:00:00 2001 From: jpg-130 Date: Wed, 17 Jul 2019 12:25:41 +0530 Subject: [PATCH 2/2] lgtm fixes --- project_euler/problem_07/sol2.py | 1 - 1 file changed, 1 deletion(-) diff --git a/project_euler/problem_07/sol2.py b/project_euler/problem_07/sol2.py index 630e5196796d..3dc0b1343eb7 100644 --- a/project_euler/problem_07/sol2.py +++ b/project_euler/problem_07/sol2.py @@ -7,7 +7,6 @@ We can see that the 6th prime is 13. What is the Nth prime number? """ from __future__ import print_function -from math import sqrt try: raw_input # Python 2