02
Reasoning
·
Combinatorial Enumeration
Permutations (Backtracking)
⏱
O(n·n!)
◧
O(n)
start
1
2
3
4
0
1
2
3
State vector
[
1
,
2
,
3
,
4
]
Step
1
/ 218
Speed
0.5×
1×
2×
4×
Speed
0.5×
1×
2×
4×