题解 | #蛇形矩阵#JavaScript解答

对于将蛇形矩阵主要是提前设好四个边界，四个边界不断的缩小，最后缩到矩阵的中心。

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void (async function () {
    // Write your code here
    while ((line = await readline())) {
        let n = parseInt(line);
        let num = 1;
        let left = 0;
        let top = 0;
        let right = n - 1;
        let bottom = n - 1;
        let result = new Array(n).fill(0).map(() => new Array(n).fill(0));
        let target = n * n;

        while (target >= num) {
            for (let i = left; i <= right; i++) {
                result[top][i] = num++;
            }
            top++;

            for (let i = top; i <= bottom; i++) {
                result[i][right] = num++;
            }
            right--;

            for (let i = right; i >= left; i--) {
                result[bottom][i] = num++;
            }
            bottom--;

            for (let i = bottom; i >= top; i--) {
                result[i][left] = num++;
            }
            left++;
        }
        let res = [];
        result.forEach(item => {
            res = [...res,...item]
        })
        console.log(...res)
    }
})();