Data commit

Task/Recamans-sequence/Go/recamans-sequence.go

@@ -0,0 +1,39 @@
+package main
+
+import "fmt"
+
+func main() {
+    a := []int{0}
+    used := make(map[int]bool, 1001)
+    used[0] = true
+    used1000 := make(map[int]bool, 1001)
+    used1000[0] = true
+    for n, foundDup := 1, false; n <= 15 || !foundDup || len(used1000) < 1001; n++ {
+        next := a[n-1] - n
+        if next < 1 || used[next] {
+            next += 2 * n
+        }
+        alreadyUsed := used[next]
+        a = append(a, next)
+
+        if !alreadyUsed {
+            used[next] = true
+            if next >= 0 && next <= 1000 {
+                used1000[next] = true
+            }
+        }
+
+        if n == 14 {
+            fmt.Println("The first 15 terms of the Recaman's sequence are:", a)
+        }
+
+        if !foundDup && alreadyUsed {
+            fmt.Printf("The first duplicated term is a[%d] = %d\n", n, next)
+            foundDup = true
+        }
+
+        if len(used1000) == 1001 {
+            fmt.Printf("Terms up to a[%d] are needed to generate 0 to 1000\n", n)
+        }
+    }
+}