repo of algorithms
ref1 - https://github.com/nikhiljangam/Competitive-programming-resources
ref2 - https://github.com/marioyc/Online-Judge-Solutions
ref3 - https://github.com/codeIIEST/Algorithms
ref4 - https://github.com/keon/algorithms
ref5 - https://github.com/luisfcofv/competitive-programming/tree/master/Code
ref6 - https://github.com/dragonslayerx/Competitive-Programming-Repository