- Search user's info by handle
- Search user's rating by handle
- Search user's status (problems solved) by handle
- Search problemset follow options
- Bookmark the problems and save them
- See current or upcoming + finished contests
- Draw the graph with vertexes and edges
- Add new node and nodes' weight
- Add edge of two nodes and edges' weight (even edge of one node and its own)
- Infinite space
- Customize the node radius, edge width, nodes' color, node weight's color, edges' color, edge weight's color and background color
- Show / Hide the direct of edges
- Draw the graph based on the test input
- Copy the input data