Solutions to adventofcode.com 2020 Written in golang with tests Usage: cd 2020; go clean -r; go build; ./2020 -input=1.txt -problem=1 2021 Written in golang Usage: cd 2021; go clean -r; go build; ./2021 -input=1.txt -problem=1 Test : cd 2021; go test -v -run=TestDay10