题解 | #矩阵乘法#

while(line = readline()) {
    let x = parseInt(line);
    let y = parseInt(readline());
    let z = parseInt(readline());

    let A = [];
    let B = [];
    let C = Array(x).fill(0).map(x => Array(z).fill(0));

    for (let i=0; i< x;i++) {
        A.push(readline()); 
    }
    for (let i=0; i< y;i++) {
        B.push(readline()); 
    }
    A = A.map(
        x => x.split(' ').map(
            x => parseInt(x)
        ));
    B = B.map(
        x => x.split(' ').map(
            x => parseInt(x)
        ));;


    for(let i=0; i<x; i++) {
        for (let j=0; j<z; j++) {
            for(let k=0; k< y; k++) {
              C[i][j] += A[i][k] * B[k][j];
            }
        }
    }

    for(let item of C) {
        print(item.join(' '));
    }
}