Comments and small changes - Added some comments - Removed the extra check when adding edges
Comments and small changes
- Added some comments
- Removed the extra check when adding edges

smac89/UVA_OJ,smac89/playground,smac89/UVA_OJ,smac89/playground,smac89/UVA_OJ,smac89/UVA_OJ,smac89/playground,smac89/playground,smac89/playground,smac89/UVA_OJ,smac89/playground,smac89/UVA_OJ