package main
import (
"fmt"
"log"
"os"
"strconv"
)
func goconcfib(n int) chan int {
result := make(chan int)
go concfib(n, result)
return result
}
func concfib(n int, output chan int) {
if n < 2 {
output <- 1
} else {
a, b := goconcfib(n-1), goconcfib(n-2)
output <- (<-a) + (<-b)
}
close(output)
}
func main() {
number, err := strconv.Atoi(os.Args[1])
if err != nil {
log.Fatal(err)
}
fmt.Printf("fib(%d) = %d\n", number, <-goconcfib(number))
}
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