Given a string A and two integer B and C.Find and return the substring of A starting from index B and ending with index C.NOTE:Consider 0 based indexing.Try to use direct library function to solve this.Problem Constraints1 <= |A| <= 1000 <= B, C < |A|
Question
Given a string A and two integer B and C.Find and return the substring of A starting from index B and ending with index C.NOTE:Consider 0 based indexing.Try to use direct library function to solve this.Problem Constraints1 <= |A| <= 1000 <= B, C < |A|
Solution
To solve this problem in Python, you can use the slicing feature of Python strings. Here are the steps:
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First, ensure that the string A is not empty and the integers B and C are within the range of the string's length. If not, return an error message or handle it accordingly.
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Use the slicing feature of Python strings to get the substring. In Python, you can get a substring by using the syntax
string[start:end], wherestartis the starting index andendis the ending index. Note that the starting index is inclusive and the ending index is exclusive.
Here is a Python function that solves the problem:
def get_substring(A, B, C):
if not A or B < 0 or C >= len(A):
return "Invalid input"
return A[B:C+1]
In this function, A[B:C+1] gets the substring of A starting from index B and ending with index C. The +1 is necessary because the ending index in Python slicing is exclusive.
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Given two integers N and K, the task is to find the string S of minimum length such that it contains all possible strings of size N as a substring. The characters of the string should be from integers ranging from 0 to K-1. Example 1:Input:N = 2, K = 2Output: 00110Explanation: Allowed characters are from 0 to k-1 (i.e., 0 and 1).There are 4 string possible of size N=2 (i.e "00", "01","10","11")"00110" contains all possible string as a substring. It also has the minimum length.Example 2:Input:N = 2, K = 3Output: 0010211220Explanation: Allowed characters are from 0 to k-1 (i.e., 0, 1 and 2).There are total 9 strings possibleof size N, given output string has the minimumlength that contains all those strings as substring.Your Task: You don't need to read input or print anything. Complete the function findString( ) which takes the integer N and the integer K as input parameters and returns the string.Note: In case of multiple answers, return any string of minimum length which satisfies above condition. The driver will print the length of the string. In case of wrong answer it will print -1.Expected Time Complexity: O(KNlogK)Expected Space Complexity: O(KNN)Constraints:1 ≤ N ≤ 41 < K < 101 < KNN < 106
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