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Articles on Trending Technologies
Technical articles with clear explanations and examples
Count Number of Teams in C++
Suppose there are n soldiers standing in a line. Here each soldier is assigned a unique rating value. We have to make a team of 3 soldiers amongst them using the following rules −Choose 3 soldiers with index (i, j, k) such that the rating (rating[i], rating[j], rating[k]).A team will be valid if − (rating[i] < rating[j] < rating[k]) or (rating[i] > rating[j] > rating[k]).We have to find the number of teams we can form. (soldiers can be part of multiple teams).So, if the input is like rating = [2, 5, 3, 4, 1], then the output will be 3, ...
Read MoreConstruct K Palindrome Strings in C++
Suppose we have a string s and a number k. We have to construct k non-empty palindrome strings using all the characters in s. So here we have to check whether we can use all the characters in s to construct k palindrome strings or not.So, if the input is like "true", k = 4, then the output will be True, as the only possible solution is to put each character in a separate string.To solve this, we will follow these steps −n := size of sif n < k, then −return falseif n is same as k, then −return ...
Read MoreCircle 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 MoreHow to put url into a variable when button is clicked - jQuery?
For this, call a function on button click.ExampleFollowing is the code − Document ClickMeToCopyURL https://www.tutorialspoint.com/index/ function demoForCopyURL(e) { event.preventDefault(); var rootText = event.target.parentElement.innerText var btnText = event.target.innerText var originalURLValue = rootText.substring(btnText.length + 1) console.log("THE URL IS=" + originalURLValue) } To run the above program, save the file name “anyName.html(index.html)”. Right click on the file and select the option “Open with Live Server” in VSCode editor −OutputThis will produce the following output on console −On clicking the button, you will get the following output on console −
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 ...
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