# Print the matrix diagonally downwards

Given a matrix of size n*n, print the matrix in the following pattern.

**Output: 1 2 5 3 6 9 4 7 10 13 8 11 14 12 15 16**

**Examples:**

Input :matrix[2][2]= { {1, 2}, {3, 4} } Output : 1 2 3 4 Input :matrix[3][3]= { {1, 2, 3}, {4, 5, 6}, {7, 8, 9} } Output : 1 2 4 3 5 7 6 8 9

Following is the C++ implementation for the above pattern.

`// CPP program to print matrix downward ` `#include <bits/stdc++.h> ` `using` `namespace` `std; ` ` ` `void` `printMatrixDiagonallyDown(vector<vector<` `int` `> > matrix, ` ` ` `int` `n) ` `{ ` ` ` `// printing elements above and on ` ` ` `// second diagonal ` ` ` `for` `(` `int` `k = 0; k < n; k++) { ` ` ` ` ` `// traversing downwards starting ` ` ` `// from first row ` ` ` `int` `row = 0, col = k; ` ` ` `while` `(col >= 0) { ` ` ` `cout << matrix[row][col] << ` `" "` `; ` ` ` `row++, col--; ` ` ` `} ` ` ` `} ` ` ` ` ` `// printing elements below second ` ` ` `// diagonal ` ` ` `for` `(` `int` `j = 1; j < n; j++) { ` ` ` ` ` `// traversing downwards starting ` ` ` `// from last column ` ` ` `int` `col = n - 1, row = j; ` ` ` `while` `(row < n) { ` ` ` `cout << matrix[row][col] << ` `" "` `; ` ` ` `row++, col--; ` ` ` `} ` ` ` `} ` `} ` ` ` `int` `main() ` `{ ` ` ` `vector<vector<` `int` `> > matrix{ { 1, 2, 3 }, ` ` ` `{ 4, 5, 6 }, ` ` ` `{ 7, 8, 9 } }; ` ` ` `int` `n = 3; ` ` ` `printMatrixDiagonallyDown(matrix, n); ` ` ` `return` `0; ` `} ` |

*chevron_right*

*filter_none*

**Output:**

1 2 4 3 5 7 6 8 9

** Time Complexity: O(n*n) **

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