python create a matrix with one in diagonal
# Create a matrix in python and fill
import numpy as np
a = np.zeros((3, 3), int) # Create matrix with only 0
np.fill_diagonal(a, 1) # fill diagonal with 1
print(a)python create a matrix with one in diagonal
# Create a matrix in python and fill
import numpy as np
a = np.zeros((3, 3), int) # Create matrix with only 0
np.fill_diagonal(a, 1) # fill diagonal with 1
print(a)matrix diagonal sum Python
# Problem Link : https://leetcode.com/problems/matrix-diagonal-sum/
class Solution(object):
def diagonalSum(self, array):
"""
:type array: List[List[int]]
:rtype: int
"""
n = len(array)
primary = 0
secondary = 0;
for i in range(0, n):
primary += array[i][i]
secondary += array[i][n-i-1]
if (n % 2 == 0): return primary + secondary
else: return primary + secondary - array[n//2][n//2]Copyright © 2021 Codeinu
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