Initial import
Add buggy code
Add unit test to test buggy code
Improve test
Rename to a more explicit name
Improve signature method
Compare sort algorithms: merge sort used by Collections method and hand
made sort
Rename classes
Add binary search
Simple stack implementation
No use of JDK stuff
Min was computed correctly
Brute force sum resolver implementation
Fix bug: a number cannot be used twice to build a pair
Fix NPE
Add benchmark
Try to resolve a problem which seems to be NP complete