Can any one know the best resourse where i can learn dsa for free

Answer 1

A simple search here would have saved you time:

https://sololearn.com/compiler-playground/W0uW3Wks8UBk/?ref=app
https://sololearn.com/compiler-playground/W3uiji9X28C1/?ref=app
https://www.sololearn.com/discuss/2877163/?ref=app
https://www.sololearn.com/discuss/2309585/?ref=app
https://www.sololearn.com/discuss/2781422/?ref=app
https://www.sololearn.com/discuss/3281071/?ref=app
https://www.sololearn.com/discuss/3327791/?ref=app