题解 | #走方格的方案数#

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
    function move(m, n){
        //基线条件
        if(m == 0 || n == 0){
            return 1;
        }else{
        //递归条件
            return move(m - 1, n) + move(m, n - 1);
        }
        
    }
    while(line = await readline()){
        let tokens = line.split(' ');
        let a = parseInt(tokens[0]);
        let b = parseInt(tokens[1]);
        console.log(move(a, b));
    }
}()