Leetcode diagonal sum

Matrix diagonal sum leetcode

# 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]

Source: grepper.com

Matrix diagonal sum leetcode

// Problem Link : https://leetcode.com/problems/matrix-diagonal-sum/

class Solution {
    public int diagonalSum(int[][] mat) {
        int n = mat.length;
        int principal = 0, secondary = 0;
        for (int i = 0; i < n; i++) {
            principal += mat[i][i];
            secondary += mat[i][n - i - 1];
        }
        return n%2 == 0 ? (principal + secondary) : (principal + secondary - mat[n/2][n/2]);
    }
}

Source: grepper.com

Similar codes

0 vote176 views1 answer
How to get max id in mongodb python
Python
-1 vote149 views1 answer
Add column python list
Python
1 vote161 views1 answer
Jupyter notebook reload module
Python
3 votes150 views2 answers
List vs tuple python
Python
4 votes131 views2 answers
Mysql.connector.errors.NotSupportedError: Authentication plugin 'caching_sha2_password' is not supported
Python
4 votes129 views1 answer
Drop Rows by Index in dataframe
Python
0 vote147 views1 answer
What is self
Python
0 vote135 views2 answers
Seaborn distribution plot for all columns
Python
0 vote175 views1 answer
Increase colorbar ticksize
Python
49 votes129 views3 answers
Python write csv line by line
Python