Revert "Revert "Intial commit""

This reverts commit f640f3f46421438d688449dac151fe2a290a5590.
Revert "Revert "Revert "Intial commit"""

This reverts commit 84a1b8eaf10a0c6f706ae753d3e9b93fd88ebc81.
Inital commit and add sum_diff file