06. Magic Matrices от More Exercise: Arrays 80/100 in judge

Katie 8 Точки

06. Magic Matrices от More Exercise: Arrays 80/100 in judge

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на 06. Magic Matrices от More Exercise: Arrays получавам 80/100 в judge. Не мога да разбера къде е проблемът. При изпълнение локално при подадените данни имам правилни отговори. В judge ми дава грешка при един тест и не се вижда каква е тя.

Условието е :

Write a function that checks if a given matrix of numbers is magical. A matrix is magical if the sums of the cells of every row and every column are equal.

Input: The input comes as an array of arrays, containing numbers (number 2D matrix). The input numbers will always be positive.

Output: The output is a Boolean result indicating whether the matrix is magical or not.

Моето решение:

function magicMatrices(arr) {

let isMagic = true;

for(let i = 0; i < arr.length; i++) { // rows, just access

let columnSum = 0;

let rowSum = 0;

for (let j = 0; j < arr[i].length; j++) {// columns, just access

columnSum += arr[i][j]; // suming the columns for the current row

}

for (let row = 0; row < arr.length; row++ ) {

rowSum += arr[row][i]; // suming the rows for the current column

}

if (rowSum != columnSum) {

isMagic = false;

break;

}

console.log(isMagic);

}

magicMatrices([[4, 5, 6], [6, 5, 4], [5, 5, 5]]);

magicMatrices([[11, 32, 45], [21, 0, 1], [21, 1, 1]]);

magicMatrices([[1, 0, 0], [0, 0, 1], [0, 1, 0]]);

Тагове:

07/06/2021 01:24:05 JavaScript Fundamentals

Axiomatik 2422 Точки

Yeah, that exercise is tricky and only works out when implementing an validation prior to the for-loop, where the sum of all rows and columns is calculated and then compared to the actual sum for each rows and columns. :-(

Code:

function solve(matrix) {
    let rowTotal = matrix[0].reduce((a, b) => a + b);
    let colTotal = 0;

    matrix.forEach(row => {
        colTotal += row[0];
    });

    let result = true;
    let counter = 0;

    for (let i = 0; i < matrix.length; i++) {
        const currentRow = matrix[i].reduce((acc, item) => acc + item);
        let currentCol = 0;
        for (let j = 0; j < matrix.length; j++) {
            const num = matrix[j][i];
            currentCol += num;
        }
        if (currentRow !== rowTotal || currentCol !== colTotal) {
            result = false;
          	break;
        }

    }

    console.log(result);
}

07/06/2021 10:07:39

Katie 8 Точки

Много благодаря за помощта, Axiomatiк! Нямаше как да го подразбера от условието...

07/06/2021 12:15:54 07/06/2021 12:17:23