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38 lines
933 B
38 lines
933 B
'''
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Author: SJ2050
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Date: 2021-10-16 22:04:07
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LastEditTime: 2021-10-16 23:25:30
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Version: v0.0.1
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Description: Solution for homework7.
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Copyright © 2021 SJ2050
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'''
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def searchMatrix(matrix, target):
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if (len(matrix) == 0 ):
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return False
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i = len(matrix)-1
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j = 0
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while (i>=0 and j < len(matrix[0])):
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if (matrix[i][j] == target):
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return True
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elif (matrix[i][j] < target):
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j += 1
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elif(matrix[i][j] > target):
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i -= 1
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return False
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if __name__ == "__main__":
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matrix = [
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[1, 4, 7, 11, 15],
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[2, 5, 8, 12, 19],
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[3, 6, 9, 16, 22],
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[10, 13, 14, 17, 24],
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[18, 21, 23, 26, 30]
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]
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target = 20
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print(searchMatrix(matrix, target))
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# 算法说明：
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# 从矩阵左下角，先排除不符合条件的列，再排除不符合条件的行，将范围一直往右上角缩小
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