Code
The highlighted line runs next. The pill shows the live values in the running call.
Cost
Work done so far, and how the four solutions compare
The list
Red dashed node is the one to remove
The highlighted line runs next. The pill shows the live values in the running call.
Work done so far, and how the four solutions compare
Red dashed node is the one to remove
Keyboard: ← → step, Space play or pause. 1 to 8 node values (0 to 100) and 1 ≤ n ≤ length. The Java recursion keeps the shared counter in a field and C++ passes it by reference, matching Python's one-item list. The C++ code unlinks the node without deleting it, as LeetCode does.