[백준] 10872 Node.js 팩토리얼

const fs = require('fs');
const input = parseInt(fs.readFileSync('/dev/stdin').toString().trim());

const factorial = (n) => {
   if(n === 1 || n === 0) {
     return 1;  
   }
   return n * factorial(n-1) 
}

console.log(factorial(input))