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Server Side Programming Articles
Page 1175 of 2109
Check if a string can become empty by recursively deleting a given sub-string in C++
Suppose, we are given two strings, str1 and str2. str2 is a substring of str1, and we can delete str2 from str1. It is possible, that the string str2 appears multiple times in str1. Our goal here is to find out if str1 becomes a null string if we keep removing str2 from str1 multiple times. If it is possible we return 1, otherwise 0.So, if the input is like str1 = "CCCPPPPPP", str2 = "CPP"; then the output will be true.To solve this, we will follow these steps −while size of str1 > 0, do −index := return the ...
Read MoreCount pairs in an array such that frequency of one is at least value of other in C++
We are given an array of positive integers. The goal is to find the count of pairs of elements of arr[] such that pairs have elements ( A, B ) where frequency of A is B times and frequency of B is A.Let us understand with examples.Input − int arr[] = { 3, 3, 3, 5, 5, 6, 6}Output − Count of pairs in an array such that frequency of one is at least value of other are − 1Explanation − The valid pairs in an array where A occurs B times and B occurs A times are (3, 3) ...
Read MoreCheck if a string contains a palindromic sub-string of even length in C++
Suppose, we are given a string that contains only lowercase letters. Our task is to find if there exists a substring in the given string that is a palindrome and is of even length. If found, we return 1 otherwise 0.So, if the input is like "afternoon", then the output will be true.To solve this, we will follow these steps −for initialize x := 0, when x < length of string - 1, increase x by 1, do −if string[x] is same as string[x + 1], then:return truereturn falseExample (C++)Let us see the following implementation to get better understanding −#include ...
Read MoreCount pairs (p, q) such that p occurs in array at least q times and q occurs at least p times in C++
We are given an array of positive integers. The goal is to find the count of pairs of elements of arr[] such that pairs have elements ( p, q ) where p occurs in array for at least q times and q occurs in array for at-least p times.Let us understand with examples.Input − int arr[] = { 3, 3, 3, 5, 5, 6, 6}Output − Count of pairs in an array such that frequency of one is at least value of other are − 1Explanation − The valid pairs in an array where p occurs q times and q ...
Read MoreCheck if a string follows anbn pattern or not in C++
Suppose, we are given a string that is made of only two letters a and b. We have to find out if the string is of the form anbn, or in other words it contains n number of a's followed by n number of b's. If true, we return 1 otherwise 0.So, if the input is like "aaaaaaaaaaaabbbbbbbbbbbb", then the output will be true.To solve this, we will follow these steps −length := length of input_stringfor initialize i := 0, when i < length, update (increase i by 1), do &minusif input_string[i] is not equal to 'a', then −Come out ...
Read MoreCount of strings that can be formed from another string using each character at-most once in C++
We are given two strings i.e. str1 and str2 and the task is to calculate the count of strings that can completely be generated from another string, but we can use one character once for forming the string. Like, we will take two strings str1 and str2 and check for the occurrence of str2 in str1 by using the character of str1 exactly once.Input − str_1 = "technical learning", str_2 = "learning"Output − Count of strings that can be formed from another string using each character at-most once are − 1Explanation − As we can see str_2 occurs in str_1 ...
Read MoreCount of sub-arrays whose elements can be re-arranged to form palindromes in C++
We are given an array of integer elements and the task is to calculate the count of sub-arrays that can be formed from the given array such that its elements can form a valid palindrome. Palindromes are the sequences that are arranged similarly from start and the end.Input − int arr[] = { 3, 3, 1, 4, 2, 1, 5}Output − Count of sub-arrays whose elements can be re-arranged to form palindromes are − 9Explanation − The valid sub-arrays whose elements can be arranged to form a palindrome are {3}, {3}, {1}, {4}, {2}, {1}, {5}, {1, 2, 1} and ...
Read MoreCount pairs of parentheses sequences such that parentheses are balanced in C++
We are given a string containing the parentheses and the task is to calculate the count of pairs of parentheses sequences that can be formed such that the parentheses are balanced.Parentheses are said to be balanced when there are equal numbers of opening and closing brackets. The parentheses used once can’t be considered twice for forming the pair.Input − string paran[] = { ")()())", "(", ")(", ")(", ")" }Output − Count of pairs of parentheses sequences such that parentheses are balanced are: 1Explanation − we will take every set of string to calculate the count better. Lets take the first ...
Read MoreCount possible moves in the given direction in a grid in C++
We are two variables n and m representing a grid of size n x m and initial point x, y to start from.Also given pairs of steps/moves that can be taken to traverse inside the grid as moves ( (1, 1), (2, 2) ) etc. Each pair of moves represents the unit of steps taken in the x, y axis. The goal is to find the total steps that can be taken to traverse inside the grid within boundaries [1, n] X [1, m] If n is 5 and m is 4 and current position is 2, 2 and step ...
Read MoreCount permutations that are first decreasing then increasing in C++
We are a variable num. The goal is to find the count of permutations of numbers between [1, num] in which numbers are first decreasing then increasing. For example if num=3 then numbers are 1, 2, 3. The permutations will be [ 3, 1, 2 ] and [2, 1, 3] and count is 2.We know that in every permutation the change from decreasing of numbers to increasing of numbers will be decided based on position of 1 which is smallest. After each 1 the numbers will start increasing. For a permutation to decrease and then increase, 1 should lie between ...
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