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Delete searches/peakelementin2D.py

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Hariharan 2024-10-15 20:03:42 +05:30 committed by GitHub
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searches/peakelementin2D.py
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def find_peak_util(matrix, left, right, row_count):
mid_col = (left + right) // 2
max_row_index = 0
for i in range(row_count):
if matrix[i][mid_col] > matrix[max_row_index][mid_col]:
max_row_index = i
if (
mid_col == 0
or matrix[max_row_index][mid_col] >= matrix[max_row_index][mid_col - 1]
) and (
mid_col == len(matrix[0]) - 1
or matrix[max_row_index][mid_col] >= matrix[max_row_index][mid_col + 1]
):
return matrix[max_row_index][mid_col]
if (
mid_col > 0
and matrix[max_row_index][mid_col - 1] > matrix[max_row_index][mid_col]
):
return find_peak_util(matrix, left, mid_col - 1, row_count)
return find_peak_util(matrix, mid_col + 1, right, row_count)
def find_peak(matrix):
if not matrix or not matrix[0]:
return None
return find_peak_util(matrix, 0, len(matrix[0]) - 1, len(matrix))
matrix = [[10, 8, 10, 10], [14, 13, 12, 11], [15, 9, 11, 21], [16, 17, 19, 20]]
peak = find_peak(matrix)
print(f"Peak element is: {peak}")