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| author | Santo Cariotti <santo@dcariotti.me> | 2024-05-28 10:29:13 +0200 |
|---|---|---|
| committer | Santo Cariotti <santo@dcariotti.me> | 2024-05-28 10:29:13 +0200 |
| commit | f05d888a0b621ca4e99e2b0fb6e23c097006fe41 (patch) | |
| tree | eebbb2489144112d3288393e354d19375a0aa088 /progs/a968.py | |
Init
Diffstat (limited to 'progs/a968.py')
| -rw-r--r-- | progs/a968.py | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/progs/a968.py b/progs/a968.py new file mode 100644 index 0000000..5a0b8f1 --- /dev/null +++ b/progs/a968.py @@ -0,0 +1,11 @@ +def count_ways(n):
+ A = [0] * (n + 1)
+ B = [0] * (n + 1)
+ A[0] = 1
+ A[1] = 0
+ B[0] = 0
+ B[1] = 1
+ for i in range(2, n+1):
+ A[i] = A[i - 2] + 2 * B[i - 1]
+ B[i] = A[i - 1] + B[i - 2]
+ return A[n]
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