Given a N x N matrix M. Write a program to find count of all the distinct elements common to all rows of the matrix. Print count of such elements.

Example 1:

Input: 
N = 4
M = {{2, 1, 4, 3},
     {1, 2, 3, 2},
     {3, 6, 2, 3},
     {5, 2, 5, 3}}
Output: 
2
Explaination: Only 2 and 3 are common in all rows.

Example 2:

Input: 
N = 5
M = {{12, 1, 14, 3, 16},
     {14, 2, 1, 3, 35},
     {14, 1, 14, 3, 11},
     {14, 5, 3, 2, 1},
     {1, 18, 3, 21, 14}}
Output: 
3
Explaination: 14, 3 and 1 are common in all the rows.

Your Task:
You do not need to read input or print anything. Your task is to complete the function distinct() which takes the matrix and n as input parameters and returns the number of distinct elements present in every row.

Expected Time Complexity: O(N*N)
Expected Auxiliary Space: O(N)

Constraints:
1 ≤ N ≤ 100
1 ≤ M[i][j] ≤ 1000