This long challenge might be one of the toughest long challenges,but for those who are here for learning,for developing his/her skillset rather than caring for rating,this long challenge is a blessing in disguise,i being a noob in dsa learned so many things while solving the questions from 4 onwards…although,i am not being able to come up with some efficient solution but the more i dig into a question,the more i learn about some algorithm/ds
Hope Codechef continues selecting questions like this in the forthcoming long challenges,i am pretty sure it will help people like me to improve and perform better in future.
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