题解 | #蛇形矩阵#

const readline = require("readline");

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
});

(function () {
    rl.on("line", function (line: string) {
        let row = +line;
        let sum = 0;
        for (let i = 1; i <= +line; i++) {
            sum += row;
            row--;
        }

        row = +line;
        let temp = sum;
        let arr = [];
        for (let i = 0; i < +line; i++) {
            arr.unshift(temp);
            temp -= row;
            row--;
        }

        for (let i = 0; i < +line; i++) {
            console.log(arr.join(" "));
            arr.shift();
            arr = arr.map((item) => item - 1);
        }
    });
})();

硬遍历