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Programming Articles
Page 1237 of 2547
Circle and Rectangle Overlapping in C++
Suppose we have a circle represented as (radius, xc, yc), here (xc, yc) is the center coordinate of the circle. We also have an axis-aligned rectangle represented as (x1, y1, x2, y2), where (x1, y1) are the coordinates of the bottom-left corner, and (x2, y2) are the coordinates of the top-right corner of the rectangle. We have to check whether the circle and rectangle are overlapped or not.So, if the input is likethen the output will be true.To solve this, we will follow these steps −Define a function eval(), this will take a, b, c, return maximum of b and ...
Read MoreNumber of Steps to Reduce a Number in Binary Representation to One in C++
Suppose we have a number s in binary form. We have to find the number of steps to reduce it to 1 under these rules −If the current number is even, we have to divide it by 2.If the current number is odd, you have to add 1 to it.So, if the input is like "1101", then the output will be 6, as "1101" is 13. So, 13 is odd, add 1 and obtain 14. Then 14 is even, divide by 2 and obtain 7. After that 7 is odd, add 1 and obtain 8.Then 8 is again, even so, ...
Read MoreLongest Happy String in C++
Suppose there is a string. That string is called happy if it does not have any of the strings like 'aaa', 'bbb' or 'ccc' as a substring. If we have three integers like a, b and c, then return any string s, which satisfies the following conditions −s is happy and longest possible.s contains at most an occurrence of the letter 'a', at most b occurrences of the letter 'b' and at most c occurrences of the letter 'c'.s will only contain 'a', 'b' and 'c' letters.If there is no such string, then return an empty string.So, if the input ...
Read MoreHow to remove rows in an R data frame using row names?
There are a lot of ways to subset an R data frame and sometimes we need to do it by removing rows. In general, the rows are removed by using the row index number but we can do the same by using row names as well. This can be done by storing the row names that should be removed in a vector and then removing through subsetting with single square brackets as shown in the below examples.ExampleConsider the below data frame:> x y row.names(df) dfOutput x y A ...
Read MoreQueries on a Permutation With Key in C++
Suppose we have an array queries of positive integers between 1 and m, we have to process all queries, queries[i] (from i=0 to n, n is the size of queries - 1) according to the following rules −At the beginning, we have the permutation P=[1, 2, 3, ..., m].For the current i, find the position of queries[i] in the permutation P (indexing from 0) and then move this at the beginning of the permutation P.We have to find an array containing the result for the given queries.So, if the input is like queries = [3, 1, 2, 1], m = ...
Read MoreHow to find the sum of diagonal elements in a table in R?
The sum of diagonal elements could be required in matrix analysis therefore, we can convert the matrix into a table and find the sum of diagonal elements. This can be easily done by using sun function by extracting diagonal elements of the table using diag function. For example, if we have a table T then the sum of diagonal elements of T can be found as sum(diag(T)).ExampleTable1
Read MoreHTML Entity Parser in C++
Suppose we have a string; we have to design one HTML parser that will replace the special character of HTML syntax into normal character. The HTML entity parser is the parser that takes HTML code as input and replace all the entities of the special characters by the characters itself. These are the special characters and their entities for HTML −Quotation Mark − the entity is " and symbol character is ".Single Quote Mark − the entity is ' and symbol character is '.Ampersand − the entity is & and symbol character is &.Greater Than Sign − the entity is ...
Read MoreFind the Minimum Number of Fibonacci Numbers Whose Sum Is K in C++
Suppose we have a number k, we have to find the minimum number of Fibonacci numbers whose sum is equal to the k, whether a Fibonacci number could be used multiple times.So, if the input is like k = 7, then the output will be 2, as the Fibonacci numbers are: 1, 1, 2, 3, 5, 8, 13, ... For k = 7 we can use 2 + 5 = 7.To solve this, we will follow these steps −Define an array finsert 0 at the end of finsert 1 at the end of fwhile last element of f = 0 and k > 0), do −if f[j] 0) { if (f[j]
Read MoreHow to create a function in R with two inputs?
To create a function with two inputs, we just need to provide two different arguments inside function. For example, if we want to create a function to find the square of a+b then we can use x and y inside function. Check out the below examples to understand how we can do it.Example1> F F(x=1, y=1) > F(x=2, y=3) > F(x=c(1, 2), y=c(2, 3))Output[1] 4 [1] 25 [1] 9 25Example> F(x=rpois(50, 2), y=rpois(50, 7))Output[1] 36 169 121 36 49 100 144 169 144 81 100 256 121 121 36 64 49 225 121 [20] 16 64 100 36 64 ...
Read MoreHow to find the intersection between two or more lists in R?
The intersection of lists means the elements that are unique and common between the lists. For example, if we have a list that contains 1, 2, 3, 3, 3, 2, 1 and the other list that contains 2, 2, 1, 2, 1 then the intersection will return only those elements that are common between the lists and also unique, hence for this example we will get 1 and 2. In R, we can do this by using intersection function along with Reduce function.Consider the below lists −ExampleList1
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