This team library is not only a collection of C++ codes, but also a diary of our many sleepless nights, a silent witness of our excitements and stuggles, a loyal companion in our difficult fights and a homage to all those who helped us learn. Contributors: Hasin Rayhan Dewan Dhruboo Saad Muhammed Junayed Anik Sarker 1st Runners-up : ACM ICPC Dhaka Regional Onsite 2019 (BUET Gifted Hypocrites) Champion : ACM ICPC Dhaka Regional Online Preliminary 2018 (BUET Upside_Down)