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Articles by Arnab Chakraborty
Page 18 of 377
Program to split lists into strictly increasing sublists of size greater than k in Python
Suppose we have a list of numbers called nums, and another value k, we have to check whether it is possible to split the list into sublists lists such that each sublist has length ≥ k and that is strictly increasing. The list does not need to be split contiguously.So, if the input is like nums = [6, 7, 5, 10, 13] k = 2, then the output will be True, as the split is [5, 6] and [7, 10, 13].To solve this, we will follow these steps −c := A map that contains elements of nums and its countsmax_count := maximum of all frequencies of creturn True when max_count * k
Read MoreCheck whether two strings are anagram of each other in Python
Suppose we have two strings s and t we have to check whether they are anagram of each other or not.So, if the input is like s = "bite" t = "biet", then the output will be True as s ad t are made of same characters.To solve this, we will follow these steps −if size of s is not same as size of t, thenreturn Falsesort characters of s and treturn true if s is exactly same as t, otherwise falseLet us see the following implementation to get better understanding −Example Codedef solve(s, t): if len(s) != len(t): ...
Read MoreProgram to check whether we can split list into consecutive increasing sublists or not in Python
Suppose we have a list of numbers called nums and that is sorted in non-decreasing order, we have to check whether it can be split into any number of subsequences such that each subsequence has at minimum length of 3 and that is consecutively increasing.So, if the input is like nums = [2, 3, 4, 4, 5, 6, 7], then the output will be True, as we can split the list to [2, 3, 4] and [4, 5, 6, 7].To solve this, we will follow these steps −counts := A map that contains elements of nums and its countsstarts := ...
Read MoreCheck if a string can be repeated to make another string in Python
Suppose we have two strings s and t, we have to find how many times the string s can be concatenated to generate t. If we cannot generate t using s, then return -1.So, if the input is like s = "tom" t = "tomtomtom", then the output will be 3 as we can concatenate "tom" 3 times to get "tomtomtom".To solve this, we will follow these steps −if size of t is not divisible by size of s, thenreturn -1cnt := quotient of (size of t / size of s)s := concatenate s cnt number of timesif s is ...
Read MoreCheck if a string can become empty by recursively deleting a given sub-string in Python
Suppose we have two strings s and t. We can delete t from s any number of times. And t appears only once at a time. We have to check whether s can become empty by removing t as many times as required.So, if the input is like s = "pipipinnn" t = "pin", then the output will be True as we can remove "pin" from "pipipinnn", then we will get "pipinn", again remove "pin" to get string "pin", then remove it to make it empty.To solve this, we will follow these steps −while size of s > 0, doposition ...
Read MoreProgram to find length of longest arithmetic subsequence of a given list in Python
Suppose we have a list of numbers called nums, we have to find the length of the longest arithmetic subsequence. As we know a sequence S[i] is an arithmetic sequence when S[i+1] - S[i] have the same value for every i in range (0 ≤ i < Size of S - 1).So, if the input is like nums = [1, 4, 7, 10, 13, 20, 16], then the output will be 6, the subsequence [1, 4, 7, 10, 13, 16] is an arithmetic because the difference between each consecutive element is 3.To solve this, we will follow these steps −n := size of arrif n
Read MoreCheck if a string contains a palindromic sub-string of even length in Python
Suppose we have a string s. We have to check whether this string contains some even length palindrome or not.So, if the input is like s = "afternoon", then the output will be True as "afternoon" has even length palindrome "noon".To solve this, we will follow these steps:for i in range 0 to size of string - 1, doif string[i] is same as string[i + 1], thenreturn Truereturn FalseLet us see the following implementation to get better understanding −Exampledef solve(string): for i in range (0, len(string)): if (string[i] == string[i + 1]): ...
Read MoreProgram to find length of longest common subsequence of three strings in Python
Suppose we have three strings s1, s2, and s3, we have to find the length of their longest common subsequence.So, if the input is like s1 = "ababchemxde" s2 = "pyakcimde" s3 = "oauctime", then the output will be 4, as the longest common subsequence is "acme".To solve this, we will follow these steps −m := size of s1, n := size of s2, o := size of s3dp := a 3D matrix of size (o + 1) x (n + 1) x (m + 1)for i in range 1 to m, dofor j in range 1 to n, dofor ...
Read MoreCheck if a string follows a^n b^n pattern or not in Python
Suppose we have a string s we have to check whether the string is following the pattern a^nb^n or not. This is actually a string when n = 3, the string will be "aaabbb".So, if the input is like s = "aaaaabbbbb", then the output will be True as this follows a^5b^5.To solve this, we will follow these steps −size := size of sfor i in range 0 to size - 1, doif s[i] is not same as 'a', thencome out from loopif i * 2 is not same as size, thenreturn Falsefor j in range i to size - ...
Read MoreProgram to find length of longest path with even sum in Python
Suppose we have a binary tree. we have to find the length of the longest path whose sum is an even number.So, if the input is like image, then the output will be 5, as the path is like [5, 2, 4, 8, 5], sum = 24(even).To solve this, we will follow these steps −Define a function dfs() . This will take nodeif node is null, thenreturn a pair (0, -inf)(left_0, left_1) := dfs(left of node)(right_0, right_1) := dfs(right of node)if value of node is odd, thenans := maximum of ans, (left_1 + right_0 + 1) and (left_0 + right_1 ...
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