Given an integer X and a square matrix mat[][], the task is to remove the first X rows and columns from the given matrix and print the updated matrix.
Examples:
Input: mat[][] = {
{1, 2, 3, 4},
{5, 6, 7, 8},
{8, 9, 4, 2},
{4, 8, 9, 2} },
X = 2
Output:
4 2
9 2Input: mat[][] = {
{1, 2, 3},
{4, 5, 6},
{7, 8, 9} },
X = 1
Output:
5 6
8 9
Approach: Print the elements of the matrix arr[i][j] for all i, j ? [X, N – 1] where N is the order of the given square matrix.
Below is the implementation of the above approach:
C++
// C++ implementation of the approach#include <iostream>using namespace std;const int MAX = 50;// Function to print the matrix after// ignoring first x rows and columnsvoid remove_row_col(int arr[][MAX], int n, int x){ // Ignore first x rows and columns for (int i = x; i < n; i++) { for (int j = x; j < n; j++) { cout << arr[i][j] << " "; } cout << endl; }}// Driver Codeint main(){ // Order of the square matrix int n = 3; int arr[][MAX] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } }; int x = 1; remove_row_col(arr, n, x);} |
Java
// Java implementation of the approachimport java.io.*;class GFG {static int MAX = 50;// Function to print the matrix after// ignoring first x rows and columnsstatic void remove_row_col(int arr[][], int n, int x){ // Ignore first x rows and columns for (int i = x; i < n; i++) { for (int j = x; j < n; j++) { System.out.print( arr[i][j] + " "); } System.out.println(); }}// Driver Codepublic static void main (String[] args) { // Order of the square matrix int n = 3; int arr[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } }; int x = 1; remove_row_col(arr, n, x);}}// This code is contributed by // shk |
Python3
# Python3 implementation of the approach # Function to print the matrix after # ignoring first x rows and columns def remove_row_col(arr, n, x): # Ignore first x rows and columns for i in range(x, n): for j in range(x, n): print(arr[i][j], end = " ") print()# Driver Code if __name__ == "__main__": # Order of the square matrix n = 3 MAX = 50 arr = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] x = 1 remove_row_col(arr, n, x) # This code is contributed by Rituraj Jain |
C#
// C# implementation of the approach using System;class GFG { // Function to print the matrix after // ignoring first x rows and columns static void remove_row_col(int [,]arr, int n, int x) { // Ignore first x rows and columns for (int i = x; i < n; i++) { for (int j = x; j < n; j++) { Console.Write(arr[i, j] + " "); } Console.WriteLine(); } } // Driver Code public static void Main() { // Order of the square matrix int n = 3; int [,]arr = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } }; int x = 1; remove_row_col(arr, n, x); } } // This code is contributed by Ryuga |
PHP
<?php// PHP implementation of the approach$MAX = 50;// Function to print the matrix after// ignoring first x rows and columnsfunction remove_row_col($arr, $n, $x){ // Ignore first x rows and columns for ($i = $x; $i < $n; $i++) { for ($j = $x; $j < $n; $j++) { echo $arr[$i][$j] . " "; } echo "\n"; }}// Driver Code// Order of the square matrix$n = 3;$arr = array(array( 1, 2, 3 ), array( 4, 5, 6 ), array( 7, 8, 9 ));$x = 1;remove_row_col($arr, $n, $x);// This code is contributed by ihritik?> |
Javascript
<script>// Javascript implementation of the approachlet MAX = 50;// Function to print the matrix after// ignoring first x rows and columnsfunction remove_row_col(arr,n,x){ // Ignore first x rows and columns for (let i = x; i < n; i++) { for (let j = x; j < n; j++) { document.write( arr[i][j] + " "); } document.write("<br>"); }}// Driver Code // Order of the square matrix let n = 3; let arr = [[ 1, 2, 3 ], [ 4, 5, 6 ], [ 7, 8, 9 ]]; let x = 1; remove_row_col(arr, n, x);// This code is contributed by sravan kumar </script> |
Output
5 6 8 9
Complexity Analysis:
- Time Complexity: O(n^2), where n is an order of the given square matrix.
- Auxiliary Space: O(1), as we are not using any extra space.
Feeling lost in the world of random DSA topics, wasting time without progress? It’s time for a change! Join our DSA course, where we’ll guide you on an exciting journey to master DSA efficiently and on schedule.
Ready to dive in? Explore our Free Demo Content and join our DSA course, trusted by over 100,000 neveropen!
Ready to dive in? Explore our Free Demo Content and join our DSA course, trusted by over 100,000 neveropen!
… [Trackback]
[…] Read More Information here to that Topic: geeksforgeeks.org/remove-first-x-rows-and-columns-from-a-matrix/ […]
… [Trackback]
[…] Read More to that Topic: geeksforgeeks.org/remove-first-x-rows-and-columns-from-a-matrix/ […]
… [Trackback]
[…] There you can find 23448 more Info to that Topic: geeksforgeeks.org/remove-first-x-rows-and-columns-from-a-matrix/ […]