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Programming Articles
Page 211 of 2544
Program to find kth lexicographic sequence from 1 to n of size k Python
Suppose we have two values n and k. Now consider a list of numbers in range 1 through n [1, 2, ..., n] and generating every permutation of this list in lexicographic sequence. For example, if n = 4 we have [1234, 1243, 1324, 1342, 1423, 1432, 2134, 2143, 2314, 2341, 2413, 2431, 3124, 3142, 3214, 3241, 3412, 3421, 4123, 4132, 4213, 4231, 4312, 4321]. We have to find the kth value of this permutation sequence as a string.So, if the input is like n = 4 k = 5, then the output will be "1432"To solve this, we will ...
Read MoreCount the number of ways to tile the floor of size n x m using 1 x m size tiles in C++
Given two numbers n and m representing the length and breadth of the floor of a room. The goal is to count the number of ways in which this floor can be tiled using the tiles of size 1Xm.For ExampleInputn=3 m=2OutputCount the number of ways to tile the floor of size n x m using 1 x m size tiles are: 3ExplanationThe ways will be three 1x2 tiles arranged as shown below −Inputn=3 m=3OutputCount the number of ways to tile the floor of size n x m using 1 x m size tiles are: 2ExplanationThe ways will be three 1x3 ...
Read MoreCheck if frequency of each digit is less than the digit in Python
Suppose we have a number n, we have to check whether the occurrence of each digit of n is less than or equal to digit itself.So, if the input is like n = 5162569, then the output will be True as the digits and frequencies are (5, 2), (1, 1), (6, 2) and (9, 1), for all the frequency is either small or equal to the digit value.To solve this, we will follow these steps −for i in range 0 to 9, dotemp := n, cnt := 0while temp is non-zero, doif temp mod 10 is same as i, thencnt ...
Read MoreProgram to check some elements in matrix forms a cycle or not in python
Suppose we have a 2d matrix. We have to check whether we can start from some cell then move adjacent cells (up, down, left, right) of the same value, and come back to the same starting point. We cannot revisit a cell that we have visited last.So, if the input is like222121212221then the output will be True, as we can follow 2s to form a cycle.To solve this, we will follow these steps −R := row count of matrixC := column count of matrixvis := make a matrix of size R x C and fill with FalseDefine a function dfs() ...
Read MoreProgram to find largest average of sublist whose size at least k in Python
Suppose we have a list of numbers called nums and another value k, we have to find the largest average value of any sublist of the list whose length is at least k.So, if the input is like nums = [2, 10, -50, 4, 6, 6] k = 3, then the output will be 5.33333333, as sublist [4, 6, 6] has the largest average valueTo solve this, we will follow these steps −left := minimum of nums, right := maximum of numss := sum of all numbers in nums from index 0 to k − 1largest_avg := s / kwhile left
Read MoreCount the number of vowels occurring in all the substrings of given string in C++
Given a string str containing English alphabets. The goal is to find the number of vowels occurring in all the substrings of str. If string is “abcde” then substrings will be “a”, “b”, “c”, “d”, “e”, “ab”, “bc”, “cd”, “de”, “abc”, “bcd”, “cde”, “abcd”, “bcde”, “abcde”. The count of vowels in these substrings is 10. (a and e)For ExampleInputstr = ”aloe”OutputCount the number of vowels occurring in all the substrings of given string are: 14ExplanationThe substrings are: “a”, “l”, “o”, “e”, “al”, “lo”, “oe”, “alo”, “loe”, “aloe”. Total vowels in these are: 14Inputstr=”http”OutputCount the number of vowels occurring in all ...
Read MoreProgram to check number of requests that will be processed with given conditions in python
Suppose we have a list of requests where each list contains elements like [uid, time_sec] (uid is the user id and time_sec is the timestamp). This indicates the user whose id is uid has requested to a website at timestamp time_sec. We also have two values u and g where u denotes maximum number of requests that are allowed in any < 60 second frame for a given uid and g is the maximum number of requests that are allowed in any < 60 second frame globally. Now if we want to process each request one by one and rate ...
Read MoreCount the number of sub-arrays such that the average of elements present in the subarray is greater than that not present in the sub-array in C++
Given an array arr[ ] of positive integers. The goal is to find the count of subarrays of arr[ ] that have an average of its elements greater than the average of the rest of the elements of arr[ ] that are not present in it.For ExampleInputarr[ ] = { 3, 2, 4 }OutputCount of number of sub-arrays such that the average of elements present in the sub−array is greater than that do not present in the sub−array are: 2ExplanationThe subarrays are − [ 3 ], [ 2 ], [ 4 ], [ 3, 2 ], [ 2, 4 ], ...
Read MoreCheck if given array is almost sorted (elements are at-most one position away) in Python
Suppose we have an array of numbers called nums, where all elements are unique. We have to check whether nums is almost sorted or not. As we know an array is almost sorted when any of its elements can occur at a maximum of 1 distance away from its original position in the sorted array.So, if the input is like nums = [10, 30, 20, 40], then the output will be True as 10 is placed at its original place and all other elements are at max one place away from their actual position.To solve this, we will follow these ...
Read MoreCount of suffix increment/decrement operations to construct a given array in C++
We are given a target array arr[] containing positive integers. The goal is to construct the target array arr[] using an initial array with all 0s. The operations that can be applied on a given empty array with all 0s will suffix increment/decrement operations.If we choose any index say i, then in case of suffix increment operation we will add 1 to all elements from index i till last index.In case of suffix decrement operation we will subtract 1 from all elements from index i till last index.Let us understand with examplesInput − arr[]= { 1, 2, 3 }Output − ...
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