题解 | #蛇形矩阵#

const rl = require("readline").createInterface({ input: process.stdin });

rl.on("line", (line) => {
    const n = parseInt(line);
    const arr = []
    let count = 1;
    for (let i = 0; i < n; i++) {
        arr[i] = []
        let k = i
        for (let j = 0; j <= i; j++) {
            arr[k--][j] = count++
        }
    }
    arr.forEach(e => {
        console.log(e.join(' '))
    })
});

按照1234567升序构造即可，每层的规律为i--,j++