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) {
    let n = parseInt(line);
    let first = 1;
    for(let i =0; i<n;i++){
        let arr = [];
        first += i;
        let temp = first
        for(let j = 0; j< n-i;j++){
            arr.push(temp);
            temp += j+i+2;
        }
        console.log(arr.join(' '))
    }
});