Equal row and column pairs

class Solution:
    def equalPairs(self, grid: List[List[int]]) -> int:
        rows = grid
        cols = []
        for i in range(len(grid[0])):
            tmp = []
            for row in grid:
                tmp.append(row[i])
            cols.append(tmp)
        res = 0
        for i in rows:
            for j in cols:
                if i == j:
                    res += 1
        return res

Equal Row and Column Pairs

Given a 0-indexed n x n integer matrix grid, return the number of pairs (r_i, c_j) such that row r_i and column c_j are equal.

A row and column pair is considered equal if they contain the same elements in the same order (i.e., an equal array).

Example 1:

Input: grid = [[3,2,1],[1,7,6],[2,7,7]]
Output: 1
Explanation: There is 1 equal row and column pair:
- (Row 2, Column 1): [2,7,7]

Example 2:

Input: grid = [[3,1,2,2],[1,4,4,5],[2,4,2,2],[2,4,2,2]]
Output: 3
Explanation: There are 3 equal row and column pairs:
- (Row 0, Column 0): [3,1,2,2]
- (Row 2, Column 2): [2,4,2,2]
- (Row 3, Column 2): [2,4,2,2]

Constraints:

n == grid.length == grid[i].length
1 <= n <= 200
1 <= grid[i][j] <= 10⁵