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-rw-r--r--progs/a654.py9
1 files changed, 9 insertions, 0 deletions
diff --git a/progs/a654.py b/progs/a654.py
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+++ b/progs/a654.py
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+def count_no_of_ways(n, k):
+ dp = [0] * (n + 1)
+ total = k
+ mod = 1000000007
+ dp[1] = k
+ dp[2] = k * k
+ for i in range(3,n+1):
+ dp[i] = ((k - 1) * (dp[i - 1] + dp[i - 2])) % mod
+ return dp[n] \ No newline at end of file