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Programming Articles
Page 1163 of 2547
Largest Merge of Two Strings in C++
Let us suppose we have two strings 'a' and 'b' and a string 'merge'. The task is to fill the string 'merge' with the characters from 'a' and 'b' in such a way that, If the string 'a' is non-empty, then remove the first character from the string 'a' and copy it into string 'merge'.If the string 'b' is non-empty, then remove the first character from the string 'b' and copy it into string 'merge'.If the strings 'a' and 'b' are non-empty, then remove the first characters from string 'a' and copy it into string 'merge' and then remove the ...
Read MoreHow to change the color of X-axis label using ggplot2 in R?
The default color of labels is black but we might want to change that color to something else so that we can get attention of the viewer to the labels if it is needed. To change the color of X-axis label using ggplot2, we can use theme function that has axis.title.x argument which can be used for changing the color of the label values.ExampleConsider the below data frame −x
Read MoreHow to put space between words that start with uppercase letter in string vector in R?
To put space between words that start with uppercase letter in string vector in R, we can use gsub function. Since we can have uppercase letters as well as lowercase letters in the string vector hence, we need to properly specify both type of characters for creating the space between words. Check out the below examples to understand how it works.Examplex1
Read MoreMake three numbers Zero in C++
Let us suppose we have three numbers. The task is to count the total number of optimal steps to make all these numbers '0'.For ExampleInput-1:a = 4 b = 4c = 6Output:7Explanation: Total number of optimal steps to make all the numbers '0' is, (4, 4, 6)Removing '1' from 1st and 2nd number = (3, 3, 6)Removing '1' from 1st and 3rd number = (2, 3, 5)Removing '1' from 1st and 3rd number = (1 ,3, 4)Removing '1' from 1st and 3rd number = (0 ,3 ,3)Removing '1' from 2nd and 3rd number = (0 ,2, 2)Removing '1' from 2nd and ...
Read MoreHow to extract strings that contains a particular substring in an R vector?
Suppose we have a vector that contains multiple string elements and we want to find out which string element has a particular substring. This can be done with the help of grep function. For example, if we have a vector called x that contains five string elements each of varying length then finding which of the elements has a substring say programming then it can be done by using the command grep("programming",x,fixed=TRUE)Examplex1
Read MorePowerful Integers in C++
Let us suppose we have three integers 'a' and 'b' and 'limit'. The task is to print the numbers in the range [a, limit]. List of these numbers is said to be powerful integers and represented as, a^i + b^j such that i >= 0 and j >= 0For ExampleInput-1:a = 2b = 5limit = 10Output:[2, 3, 4, 5, 6, 7, 9]Explanation: for each i and j, 2^0 + 5^0 = 2 , 2^0 + 5^1= 6 2^1 + ...
Read MoreCount number of ways to reach destination in a Maze in C++
Given a Maze represented as a row X col matrix in which the obstacle is represented as -1 and a clear cell has value other than -1. The goal is to start from the first cell arr[0][0] and reach the last cell arr[row][col] such that only two moves are allowed:Right move arr[i][j] to arr[i][j+1] and Down move arr[i][j] to arr[i+1][j].Let us understand with examples.Input - arr[row][col] = {{0, 0, 0}, {-1, -1, 0}, {0, 0, 0}}Output - Count of number of ways to reach destination in a Maze are: 1Explanation 0 1 2 0 0 ...
Read MoreHow to round exponential numbers in R?
The exponential numbers are also called scientific numbers and these numbers have exponent representation by the letter e. For example, a number 12340000 can be represented as 1.234e + 107. We can round this to 1.2e + 107 and in R it can be done with the help of singif function.Example1x1
Read MoreHow to extract statistical summary from boxplot in R?
To extract statistical summary from boxplot we can use stats function with delta operator. For example, if we have a data frame called df that contains 5 columns then the boxplot for each column can be created by using the command boxplot(df) and if we want to extract the statistical summary from this boxplot then boxplot(df)$stats can be used.Consider the below data frame −Exampledf
Read MoreHow to Segregate a given Linked List in C++
A Linked List is a linear data structure in which each node has two blocks such that one block contains the value or data of the node and the other block contains the address of the next field.Let us assume that we have a linked list such that each node contains the data and a pointer which is pointing to the next node of the linked list. The task is to segregate the given Linked List. Segregating the linked list means we have to separate the odd indexed nodes and even index nodes in the list.Approach to Solve this ProblemTo ...
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