题解 | #挑7#
挑7
https://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
const readline = require('readline');
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.on('line', function (line) {
const n = Number(line)
let res = 0
for(let i = 7; i <= n; i++){
if(i % 7 === 0 || (i + '').includes('7')) res++
}
console.log(res)
});
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