Code are written in JavaScript but you can use your prefered language then point is to understand algorithm and implement in your code
Quick Learning for you
I spend more time on YouTube for learning dsa then i found some very Good YouTube channel that teach very deeply some topic and collect different- different topic from different-different YouTube channel so you can learn easily and save your time
Every topic learning resouce provided in top of the file How find : Just type Topic name and toutube channel name
Love Babbar
Anuj Bhaiya
TechDose
PepCoding
Practice makes man perfect