题解 | #挑7#
挑7
https://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
简单题 把条件定好即可 完整代码如下：
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 n = parseInt(line);
let arr = Array.from(Array(n+1).keys());
arr.shift();
let res = [];
for (let i = 0; i < arr.length; i++) {
if (arr[i].toString().match(/7/g) || arr[i]%7 == 0) {
res.push(arr[i])
}
}
console.log(res.length);
}
}()
