C++ & Java

C++ nad Java codes with DSA logics

DSA Data Structures and Algorithms Concepts and other simple concepts are stored in different folders and it's now available in Java too..

cin.geltine() is a method where we can take input from user including spaces and tabs

getline functions have 3 parameters

cin.getline(a, 10, '\n');

  getline  |    |   |
/**        |    |    |  Delimiter
 *      1st    2nd  3rd Parameter
 *   Parameter Parameter
     is var*/

To take input in 2D array in Java

• Simple take a 2D variable as int and direct use this code
• import java.util.*;
• int[][] arr = new int[size][size]
• Scanner scan = new Scanner(System.in);
• arr[i][j] = scan.nextInt();
• This'll store numbers in array storage.
• This'll show garbage value which is by default zero but at() of vector will show error because if we don't added something it'll not show anything else
• It'll print segmentation fault core dumped, so it's good to use at().

About Vector library file in C++

• If we use for loop to iterate in vector then using v[i] will be safe but using v[i] direct will be unsafe because it'll show 0 as answer so alternate will be we should use v.at(); so if we cout<< that array index it'll throw error of segmentation fault core dumped so we'll get to know about that index is not initialized in vector dynamic array;

LeetCode Spiral Order Matrix Solution

• Link to the problem in LeetCode Spiral_Order_Matrix

• Solution is in the DSA Folder in spiral.cpp with comments available how to traverse like spiral.

• In While loop will continue checking till ( startRow <= endRow and startColumn <= endColumn)