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Programming Articles
Page 1251 of 2547
Count ways to spell a number with repeated digits in C++
We are given a number containing many repeated digits as a string. The goal is to find the number of ways to spell it. For example 112233 can be spelled as double one, double two double three or one one two two three three.We will do this by checking continuous numbers. If the number is “13” there is only one way to spell it as “one three” (20). If digits are “113” ways “double one three”, “one one three” (21). So, the approach is to count the one continuous digit in string and multiply 2(count-1) with the previous result.Let’s understand ...
Read MoreProgram to reverse a sentence words stored as character array in C++
Suppose we have one input string sentence where each element is stored as single character, we have to reverse the strings word by word.So, if the input is like ["t", "h", "e", " ", "m", "a", "n", " ", "i", "s", " ", "n", "l", "c", "e"], then the output will be ["n", "l", "c", "e", " ", "i", "s", " ", "m", "a", "n", " ", "t", "h", "e"]To solve this, we will follow these steps −reverse the array sj := 0n := size of sfor initialize i := 0, when i < n, update (increase i by 1), ...
Read MoreCount of lines required to write the given String in C++
We are given a string Str of alphabets and an array widths[]containing width of all English alphabets. The goal is to find the number of lines required to print this string on a page which has a width of 10 characters. Also print remaining characters.We will traverse the string check width of the current character and add it, if this sum >=10 increment number of lines.Let’s understand with examples.Input Str = "ababababab" widths[] = {2, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 2, 1, 1, 1};Output Count of ...
Read MoreCount unset bits in a range in C++
We are given an integer number let’s say, num and the range with left and right values. The task is to firstly calculate the binary digit of a number and then set the loop from the left digit till the right digit and then in the given range calculate the unset bits.Unset bits in a binary number is represented by 0. Whenever we calculate the binary number of an integer value then it is formed as the combination of 0’s and 1’s. So, the digit 0 is known as unset bit in the terms of the computer.Input − int number ...
Read MoreCount unset bits of a number in C++
We are given an integer number let’s say, num and the task is to firstly calculate the binary digit of a number and then calculate the total unset bits of a number.Unset bits in a binary number is represented by 0. Whenever we calculate the binary number of an integer value then it is formed as the combination of 0’s and 1’s. So, the digit 0 is known as unset bit in the terms of the computer.Input − int number = 50Output − Count of total unset bits in a number are − 3Explanation − Binary representation of a number ...
Read MoreHow to create heatmap in base R?
A heatmap is a diagrammatic representation of data where the values are represented with colours. Mostly, it is used to display data that has slight variation and applied on matrix data. We can draw it for a full matrix, an upper triangular matrix as well as a lower triangular matrix. This can be done with the help of image function.Example1> M MOutput [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] 7 5 4 4 3 6 5 8 3 5 [2,] 8 7 3 5 7 4 5 2 6 6 [3,] 3 2 4 2 5 12 7 3 10 2 [4,] 5 3 6 9 5 9 2 4 5 8 [5,] 3 8 5 5 4 4 4 1 2 5 [6,] 2 3 2 4 7 8 5 8 4 4 [7,] 5 6 4 4 7 3 4 8 8 2 [8,] 4 5 2 10 5 3 5 4 6 7 [9,] 8 6 4 1 4 11 6 4 6 6 [10,] 9 5 5 4 6 2 7 3 6 5Example> image(M)Output:Example2> M1 M1Output [,1] [,2] [,3] [,4] [,5] [,6] [1,] 24.75339 25.40680 23.76650 26.47724 24.54639 25.79895 [2,] 24.08571 25.17951 25.03599 25.63532 23.45812 25.39614 [3,] 24.53005 25.77095 26.21571 24.44029 24.69933 25.62839 [4,] 22.91202 25.49497 24.86587 25.25701 23.16166 24.34106 [5,] 25.37322 24.15308 25.58580 23.52173 25.25538 25.10577 [6,] 24.39613 26.06243 26.56054 25.19265 26.54187 24.35313Example> image(M1)Output:
Read MoreCount numbers which are divisible by all the numbers from 2 to 10 in C++
We are given a number let’s say, num and the task is to calculate the count of numbers in the range 1 to num that are divisible by 2, 3, 4, 5, 6, 7, 8, 9 and 10.Input − int num = 10000Output − Count numbers which are divisible by all the numbers from 2 to 10 are: 3Explanation − There are 3 numbers from 1 to 10000 that are divisible by all the numbers starting from 2 till 10 and those are −2520-: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, ...
Read MoreCount pairs whose products exist in array in C++
We are given an array of integer type elements and the task is to form the pairs from the given array and calculate the product of elements in the pair and check whether the given product is present in the given array or not.Input − int arr[] = {6, 2, 3, 1, 5, 10}Output − Count of pairs whose products exist in same array are − 7Explanation − The pairs that can be formed from the given array are: (6, 2), (6, 3), (6, 1), (6, 5), (6, 10), (2, 3), (2, 1), (2, 5), (2, 10), (3, 1), (3, ...
Read MoreHow to create a bar plot with ggplot2 using stat_summary in R?
There are multiple ways to create a bar plot in R and one such way is using stat_summary of ggplot2 package. In this function, we need to supply a function for the y-axis and to create the bars we must use geom="bar". The main thing is to decide which function should be used for y-axis values.ExampleConsider the below data frame:> x y df dfOutput x y 1 Female 3 2 Male 3 3 Female 7 4 Male 3 5 Female 8 6 Female 5 7 Male 11 8 Male 6 9 Male 5 10 ...
Read MoreCount Pairs from two arrays with even sum in C++
We are given two arrays of integer type elements let’s say, arr_1[] and arr_2[] and the task is to pick one element from arr_1[] and another element from arr_[] to form a pair then calculate the sum of elements in the pair and check whether the resultant sum is even or not.Input int arr_1[] = {2, 3, 7, 1, 4} int arr_2[] = { 2, 4, 1, 3}Output Count Pairs from two arrays with even sum are: 10Explanation We will form the pairs using both the arrays and the pairs so formed are-: (2, 2) = 4(valid), (2, 4) = 6(valid), (2, 1) ...
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