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This commit is contained in:
kanna5 2026-01-05 16:48:03 +09:00
parent 886b5e0a8e
commit 67cad91898
Signed by: kkyy
GPG key ID: 06332F3965E9B0CF
47 changed files with 1549 additions and 1 deletions
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24
solutions/7/q790/solution.go Normal file
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package q790
const (
TopHalf int8 = iota
BottomHalf
Full
Modulo int = 1e9 + 7
)
func numTilings(n int) int {
cache := make([][3]int, n+1)
cache[0][Full] = 1
cache[1][Full] = 1
for w := 2; w <= n; w++ {
cache[w][Full] = (cache[w-1][Full] + cache[w-2][Full] + cache[w-1][TopHalf] + cache[w-1][BottomHalf]) % Modulo
cache[w][TopHalf] = (cache[w-1][BottomHalf] + cache[w-2][Full]) % Modulo
cache[w][BottomHalf] = (cache[w-1][TopHalf] + cache[w-2][Full]) % Modulo
}
return cache[n][Full]
}
var _ = numTilings