题解 | #蛇形矩阵#

const readline = require('readline');

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

rl.on('line', function (line) {
    const lineNum = parseInt(line);
    let lastJ0 = 1;
    for (let i = 0; i < lineNum; i++) {
        lastJ0 = i + lastJ0;
        let nums = [lastJ0];
        for (let j = 1; j < lineNum - i; j++) {
            nums.push(nums[j-1] + i + j + 1)
        }
        console.log(nums.join(' '))
    }
});