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export default function setZeroes(matrix: number[][]): void {    const m = matrix.length;    const zerorows: number[] = [];    const zerocols: number[] = [];    matrix.forEach((a, i) => {        a.forEach((v, j) => {            if (v === 0) {                zerorows.push(i);                zerocols.push(j);            }        });    });
    zerorows.forEach((r) => {        matrix[r].fill(0);    });    zerocols.forEach((c) => {        for (let i = 0; i < m; i++) {            matrix[i][c] = 0;        }    });}