Welcome to my nodeJs, express, mongoose and jest Project

Frontend part

const id = document.getElementById('user-id');
console.log(`ID of the user: ${id}`);

Backend part

import express = require('express');
const app = experss();

Binary Search

int l=0,r=INF,ans=-1;
while(l<=r){
    int mid = (l+r)/2;
    if(ok(mid)){
	ans = mid;
	r=mid-1;
    }else l=mid+1;
}
cout<<ans<<"\n";