In this problem, we will find the maximum distance from the initial to the final character in the cyclic string. The basic approach to solve the problem is to find the next closest final character for every initial character and update the maximum distance if required. Another approach traverses the ... Read More

In this problem, we will maximize the value of the binary string by performing K XOR operations of substrings of the given binary string. To maximize any binary string, we should maximize the substring starting from the leftmost zero. For example, to maximize the ‘11001’ string, we need to choose ... Read More

In this problem, we will find the maximum sum of array elements by picking up unselected elements at the left from the current 1's index. We can use the vector list and sort() method to solve the problem or priority queue. The priority queue inserts the element in the ... Read More

In this problem, we need to maximize the ‘10’ subsequences in the given binary string by replacing the 0 or 1 ‘0’ character with ‘1’. We can replace each ‘0’ with ‘1’ one after another and find a maximum number of ‘10’ subsequences in the updated string. Problem statement − ... Read More

In this problem, we will make all strings of the given array palindromic by swapping the characters of the adjacent string. To solve the problem, we will try to make the character the same at p and str_len - p - 1 index in all strings, and it is only ... Read More

In this problem, we will find the longest substring of A to convert it to a substring of B starting from the same index in less than T cost. We will use the binary search algorithm to find the maximum length of the substring which follows the given condition. ... Read More

In this problem, we will construct two palindromic strings using the given string’s characters. We can use the character’s frequency to solve the problem. We can construct two new palindromic strings only if both characters’ frequencies are even or if any characters have an even frequency and others have an ... Read More

In this problem, we will form a triangle from the given string. The triangle will contain the rows equal to the string length - 1, and in each row, we replace the starting characters equal to the row number with '.' Character. We can use the loop to form ... Read More

In this problem, we will find the number of pairs of 3 indices so that any adjacent indices don’t have the same value in the pair. We can get the output by checking each pair of 3 indexes, but it can be more time-consuming. Another approach to solving the problem ... Read More

In this problem, we will find total invalid characters in the given string. If total distinct characters till the particular even index is prime, we can say the character is invalid. We can use the map data structure to count the total number of distinct characters while traversing the string. ... Read More