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Articles by Arnab Chakraborty
Page 36 of 377
Program to Find Out the Number of Moves to Reach the Finish Line in Python
Suppose, we have a car and are driving it on a one−dimensional road. Currently we are at position = 0 and with speed = 1. We can perform any of these two operations.Acceleration: position := position + speed and speed := speed * 2 Reverse Gear: speed := −1 when speed > 0 otherwise speed := 1.We have to find the number of moves needed at least to reach the target.So, if the input is like target = 10, then the output will be 7.To solve this, we will follow these steps −Define a function dfs() . This will take ...
Read MoreProgram to Reverse a Substring Enclosed Within Brackets in Python
Suppose, we have a lowercase string s that contains letters and parentheses "(" and ")". We have to reverse every string enclosed within parentheses in a recursive manner and return the resultant string.So, if the input is like s = "back(aps)ce", then the output will be “backspace”.To solve this, we will follow these steps −Define a function trav() . This will take s, dir, start, close:= close, ans:= ansend := "(" if dir is same as −1, otherwise ")"other := "(" if end is same as ")", otherwise ")"while start < size of s, and s[start] is not same as ...
Read MoreCheck if is possible to get given sum from a given set of elements in Python
Suppose we have an array called nums and another value sum. We have to check whether it is possible to get sum by adding elements present in nums, we may pick a single element multiple times.So, if the input is like nums = [2, 3, 5] sum = 28, then the output will be True as we can get 26 by using 5 + 5 + 5 + 5 + 3 + 3 + 2To solve this, we will follow these steps −MAX := 1000table := an array of size MAX ad fill with 0Define a function util() . This ...
Read MoreProgram to Find Out Integers Less than n Containing Multiple Similar Digits in C++
Suppose we have an integer n, we have to find the number of positive integers that are less than or equal to n, where the integer numbers at least have a digit occurring more than once.So, if the input is like n = 200, then the output will be 38To solve this, we will follow these steps −Define an array afor initialize x := n, when x is non−zero, update x := x / 10, do −insert x mod 10 at the end of areverse the array aret := nfor initialize w := 1, d := 1, when w < ...
Read MoreCheck if it is possible to convert one string into another with given constraints in Python
Suppose we have two strings s and t with only three characters 'A', 'B' and '#'. We have to check whether it is possible to convert s into t by performing these operations on s.'A' can move only to the left hand side'B' can move only to the right hand sideNeither 'A' nor 'B' can cross each otherSo, if the input is like s = "##AB##B" t = "A###B#B", then the output will be True as in s A can move easily to the left most position, and middle B can move one step to the rightTo solve this, we ...
Read MoreProgram to Find Out Median of an Integer Array in C++
Suppose we have to implement a class named MedianClass which contains the following methods −add(value) which adds a value to the data structure.median() finds the median of all the numbers currently present in the data structure.So, if we add 5, 3, 8 and find median, the output will be 5.0, then if we add 9 and find the median, the output will be 6.5.To solve this, we will follow these steps −Define priority queue left and rightDefine addNum method, this will take the number as input −if left is empty or num < top element of left, then, insert num ...
Read MoreCheck if it is possible to create a palindrome string from given N in Python
Suppose we have a number n. We have to check whether we can create an alphabetical lowercase string from that number and check whether the string is palindrome or not. Here we will take only characters from a to j, [a = 0, b = 1... j = 9]. So if the number is 42 the substring "ec" will be printed till 6 (4+2) characters "ececec" then check this is palindrome or not.So, if the input is like n = 43, then the output will be True the string is "ededede" and this is palindrome.To solve this, we will follow ...
Read MoreProgram to Find Out the Smallest Substring Containing a Specific String in Python
Suppose we have two strings s and t. We have to find the smallest substring in s, where t is also a subsequence of the substring. If that type of substring does not exist, we will return a blank string, and if there are multiple smallest substrings, we will take the leftmost one.So, if the input is like s = "abcbfbghfb", t = "fg", then the output will be fbgTo solve this, we will follow these steps −N := size of Sdp := a new list of size N initialized with infinityfor i in range 0 to N − 1, ...
Read MoreCheck if it is possible to create a polygon with a given angle in Python
Suppose we have an angle a. We have to check whether we can make a regular polygon where all angles are same as a or not.So, if the input is like a = 120, then the output will be True the pentagon has all angles same as 120°. As we know$$Interior Angle(a)=\frac{180\times(n-2)}{n}\begin{bmatrix} n=number of sides of polygon\end{bmatrix}$$ $$¿n=\frac{360}{180-a}$$So if n is integer then this is forming a regular polygon.To solve this, we will follow these steps −sides := 360 /(180 - a)if sides has no fractional part, thenreturn Truereturn FalseExampleLet us see the following implementation to get better understanding −def ...
Read MoreCheck if it is possible to create a polygon with given n sidess in Python
Suppose we have an array nums that contain the size of n sides. We have to check whether we can form a polygon with all of the given sides or not.So, if the input is like nums = [3, 4, 5], then the output will be True because there are three sides and sum of any two sides is larger than the 3rd one. To solve this, we will use this property where length of one side is smaller than the sum of all other sides.To solve this, we will follow these steps −sort the list numsif last element of ...
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