A→B→C→Acap A right arrow cap B right arrow cap C right arrow cap A
: Once a voter’s full ranking is validated, you must update the global preferences[i][j] 2D array. This array tracks how many voters preferred candidate over candidate
such that locked[i][winner] is true, then that winner is the source of the graph and should be printed. Visualizing the Preference Graph Cs50 Tideman Solution
: This usually requires a recursive helper function (often called has_cycle or is_cyclic ). If you are trying to lock a pair where , you must check if is already connected to
In a Tideman election, we represent candidates as nodes and preferences as directed edges. Below is a conceptual visualization of a 3-candidate preference strength: Final Summary Checklist A→B→C→Acap A right arrow cap B right arrow
The winner in a Tideman election is the "source" of the graph.
: This function checks if a candidate name exists in the candidates array. If found, it updates the ranks array to reflect that voter's preference (e.g., ranks[0] is their first choice). If you are trying to lock a pair
through any chain of existing locked edges. If a path exists, you skip locking that pair to prevent the cycle. 4. Identifying the Winner
Logic : Iterate through each candidate and check the locked matrix. If there is no candidate
After all votes are cast, the program identifies every possible head-to-head pair.
