13: 2352. Equal Row and Column Pairs.py

# problem:
# https://leetcode.com/problems/equal-row-and-column-pairs/

# solution:
class Solution:
    def equalPairs(self, grid: List[List[int]]) -> int:
        n=len(grid)
        ans=0
        for i in range(n):
            for j in range(n):
                k=0
                while k<n:
                    if grid[i][k] != grid[k][j]:
                        break
                    k+=1
                if k==n:
                    ans+=1
        return ans