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Search a 2D Matrix II

Question​

None

Example 1
Input: 
matrix = [
  [1,   4,  7, 11, 15],
  [2,   5,  8, 12, 19],
  [3,   6,  9, 16, 22],
  [10, 13, 14, 17, 24],
  [18, 21, 23, 26, 30]
]
Target = 5

Output: 
true

Solution​

all//Search a 2D Matrix II.py


class Solution:
    def searchMatrix(self, matrix, target):
        """
        :type matrix: List[List[int]]
        :type target: int
        :rtype: bool
        """
        if not matrix:
            return False
        row = 0
        col = len(matrix[0]) - 1
        while row < len(matrix) and col >= 0:
            if target == matrix[row][col]:
                return True
            elif target > matrix[row][col]:
                row += 1
            else:
                col -= 1
        return False