31 lines
715 B
Go
31 lines
715 B
Go
package main
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import "fmt"
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var table = [10][10]byte{
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{0, 3, 1, 7, 5, 9, 8, 6, 4, 2},
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{7, 0, 9, 2, 1, 5, 4, 8, 6, 3},
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{4, 2, 0, 6, 8, 7, 1, 3, 5, 9},
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{1, 7, 5, 0, 9, 8, 3, 4, 2, 6},
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{6, 1, 2, 3, 0, 4, 5, 9, 7, 8},
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{3, 6, 7, 4, 2, 0, 9, 5, 8, 1},
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{5, 8, 6, 9, 7, 2, 0, 1, 3, 4},
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{8, 9, 4, 5, 3, 6, 2, 0, 1, 7},
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{9, 4, 3, 8, 6, 1, 7, 2, 0, 5},
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{2, 5, 8, 1, 4, 3, 6, 7, 9, 0},
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}
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func damm(input string) bool {
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var interim byte
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for _, c := range []byte(input) {
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interim = table[interim][c-'0']
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}
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return interim == 0
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}
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func main() {
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for _, s := range []string{"5724", "5727", "112946", "112949"} {
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fmt.Printf("%6s %t\n", s, damm(s))
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}
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}
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