题解 | #[NOIP2013]记数问题#

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
    while ((line = await readline())) {
        let p = line.split(" ");
        let n = parseInt(p[0]);
        let x = parseInt(p[1]);
        let re = 0;
        for (let i = 1; i <= n; i++) {
            let strArr = i+""
            for(let j =0;j<strArr.length;j++){
                if(strArr.charAt(j)==x){
                    re++;
                }
            }
        }
        console.log(re)
    }
})();