Matrix Trace
Easy
Computer Mathematics
Matrices
33 views
Problem Statement
Given n and an n x n matrix, print its trace.
Input Format
n then n lines.
Output Format
One integer trace.
Example
2 1 2 3 4
5
Constraints
n
Input / Output Format
Input Format
n then n lines.
Output Format
One integer trace.
Constraints
n
Examples
Input:
2
1 2
3 4
Output:
5
Example Solution (Public)
Sum diagonal elements a[i][i].
Official Solution Code
Sum diagonal elements a[i][i].
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