Verify Valid n x n Matrix

In this lab, you will implement a function that verifies whether an n x n matrix is valid or not. A matrix is valid if every row and every column contains all the integers from 1 to n (inclusive).

Problem Statement

Given an n x n integer matrix matrix, return true if the matrix is valid. Otherwise, return false.

Example 1:

Input: matrix = [[1,2,3],[3,1,2],[2,3,1]]
Output: true
Explanation: In this case, n = 3, and every row and column contains the numbers 1, 2, and 3.
Hence, we return true.

Example 2:

Input: matrix = [[1,1,1],[1,2,3],[1,2,3]]
Output: false
Explanation: In this case, n = 3, but the first row and the first column do not contain the numbers 2 or 3.
Hence, we return false.

Constraints:

• n == matrix.length == matrix[i].length
• 1 <= n <= 100
• 1 <= matrix[i][j] <= n

Challenges

1. Export the isValidMatrix function from index.js.
2. Implement the isValidMatrix function to check if the matrix is valid according to the above problem statement.

Evaluation script

import fs from 'fs'

const testlog = []

// Challenge 1
try {
	const isValidMatrix = await import('/home/damner/code/index.js').then(t => t.isValidMatrix)

	if(isValidMatrix != undefined) {
		testlog.push({ status: 'pass' })
	} else {
		throw new Error('Function is not exported')
	}
} catch(error) {
	testlog.push({
		status: 'error',
		error: error.message || 'Challenge failed'
	})
}

// Challenge 2
try {
	const isValidMatrix = await import('/home/damner/code/index.js').then(t => t.isValidMatrix)

	const matrix1 = [[1, 2, 3], [3, 1, 2], [2, 3, 1]]
	const matrix2 = [[1, 1, 1], [1, 2, 3], [1, 2, 3]]

	if(isValidMatrix(matrix1) === true && isValidMatrix(matrix2) === false) {
		testlog.push({ status: 'pass' })
	} else {
		throw new Error('Function implementation incorrect')
	}
} catch(error) {
	testlog.push({
		status: 'error',
		error: error.message || 'Challenge failed'
	})
}

fs.writeFileSync('/home/damner/code/.labtests/testlog.json', JSON.stringify(testlog))
fs.writeFileSync(process.env.UNIT_TEST_OUTPUT_FILE, JSON.stringify(testlog.map(result => result.status === 'pass')))

Setting up test environment script

#!/bin/bash
set -e 1

mkdir -p /home/damner/code/.labtests

cat > /home/damner/code/.labtests/package.json << EOF
{
    "type": "module"
}
EOF

cd /home/damner/code/.labtests
mv $TEST_FILE_NAME ./nodecheck.test.js

# import puppeteer doesn't work without it
npm link puppeteer

node nodecheck.test.js 2>&1 | tee evaluationscript.log

Initial file system for user

/**
 * @param {number[][]} matrix
 * @return {boolean}
 */
export function isValidMatrix(matrix) {
    
};

{
    "name": "codedamn-lab",
    "type": "module"
}

tabs: ['index.js']
terminals: ['yarn install']