面试题3：二维数组中的查找
代码如下：
1 # coding:utf-8 2 """ 3 ========================================= 4 File:SearchMatrix.py 5 Author:Nobita 6 Time:2019/12/18 20:46 7 E-main:364942727@qq.com 8 Description：面试题3：二堆数组中的查找 9 Software:PyCharm 10 ========================================= 11 """ 12 13 ''' 14 题目： 15 在一个二维数组中，每一行都按照从左到右递增的顺序排序，每一列都按照从上到下递增的顺序排序。 16 请完成一个函数，输入这样的一个二维数组和一个整数，判断数组中是否有该整数。 17 18 输入: 19 matrix = [ 20 [1, 3, 5, 7], 21 [10, 11, 16, 20], 22 [23, 30, 34, 50] 23 ] 24 target_true = 3 25 输出: True 26 target_false = 13 27 输出: False 28 ''' 29 class Solution: 30 def searchMarix(self, matrix, target): 31 num_row = len(matrix) 32 num_col = len(matrix[0]) 33 if num_row > 0 and num_col > 0: 34 i, j = 0, num_col - 1 35 while i < num_row and j >= 0: 36 if target == matrix[i][j]: 37 return True 38 elif target < matrix[i][j]: 39 j -= 1 40 else: 41 i += 1 42 return False 43 44 if __name__ == '__main__': 45 matrix = [ 46 [1, 3, 5, 7], 47 [10, 11, 16, 20], 48 [23, 30, 34, 50] 49 ] 50 target_true = 3 51 target_false = 13 52 print(Solution().searchMarix(matrix, target_true)) 53 print(Solution().searchMarix(matrix, target_false))
代码自测：
1 # -*- coding: utf-8 -*- 2 """ 3 @File:test_SearchMatrix.py 4 @E-mail:364942727@qq.com 5 @Time:2019-12-19 8:24 6 @Author:Nobita 7 @Version:1.0 8 @Desciption:对SearchMatrix函数进行单元测试 9 """ 10 11 import unittest 12 from .SearchMatrix import Solution 13 14 15 class TestSearchMatrix(unittest.TestCase): 16 def setUp(self): 17 global matrix 18 matrix = [[1, 3, 5, 7], [10, 11, 16, 20], [23, 30, 34, 50]] 19 20 def test_01_MaxNum_in_Matrix(self): 21 '''测试二维数组中的最大值,预期输出:True''' 22 target = 50 23 result = Solution().searchMarix(matrix, target) 24 self.assertEqual(result, True, msg='test_01_测试失败！') 25 26 def test_02_MinNum_in_Matrix(self): 27 '''测试二维数组中的最小值,预期输出:True''' 28 target = 1 29 result = Solution().searchMarix(matrix, target) 30 self.assertEqual(result, True, msg='test_02_测试失败！') 31 32 def test_03_MidNum_in_Matrix(self): 33 '''测试二维数组中的中间值,预期输出:True''' 34 target = 11 35 result = Solution().searchMarix(matrix, target) 36 self.assertEqual(result, True, msg='test_03_测试失败！') 37 38 def test_04_OverMaxNum_not_in_Matrix(self): 39 '''测试二维数组中超过最大值的数,预期输出:False''' 40 target = 51 41 result = Solution().searchMarix(matrix, target) 42 self.assertEqual(result, False, msg='test_04_测试失败！') 43 44 def test_05_LessMinNum_not_in_Matrix(self): 45 '''测试二维数组中小于最小值的数,预期输出:False''' 46 target = 0 47 result = Solution().searchMarix(matrix, target) 48 self.assertEqual(result, False, msg='test_05_测试失败！') 49 50 def test_06_MatrixIsNull(self): 51 '''测试二维数组中空值矩阵,预期输出:False''' 52 target = 1 53 null_matrix = [[]] 54 result = Solution().searchMarix(null_matrix, target) 55 self.assertEqual(result, False, msg='test_06_测试失败！') 56 57 58 if __name__ == '__main__': 59 unittest.main()
