# Remove first X rows and columns from a matrix

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 2

Input: 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 using namespace std;   const int MAX = 50;   // Function to print the matrix after // ignoring first x rows and columns void 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 Code int 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 approach   import java.io.*;   class GFG {   static int MAX = 50;   // 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++)         {             System.out.print( arr[i][j] + " ");         }         System.out.println();     } }   // Driver Code public 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



## Javascript



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.

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