solved in c++
redid day 1 challenge and solved day 2
doesn't work in cases where root is negative and children should be removed instead of root
added readme
Merge branch 'contests' into week-11
Merge branch 'master' into contests
Merge branch 'contests' into week-11
read input
will go down suboptimal paths
added readme
updated readme
Merge branch 'week-11' into contests