Data commit

Task/Van-Eck-sequence/Go/van-eck-sequence-1.go

@@ -0,0 +1,20 @@
+package main
+
+import "fmt"
+
+func main() {
+    const max = 1000
+    a := make([]int, max) // all zero by default
+    for n := 0; n < max-1; n++ {
+        for m := n - 1;  m >= 0; m-- {
+            if a[m] == a[n] {
+                a[n+1] = n - m
+                break
+            }
+        }
+    }
+    fmt.Println("The first ten terms of the Van Eck sequence are:")
+    fmt.Println(a[:10])
+    fmt.Println("\nTerms 991 to 1000 of the sequence are:")
+    fmt.Println(a[990:])
+}

Task/Van-Eck-sequence/Go/van-eck-sequence-2.go

@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+func main() {
+    const max = 1000
+    a := make([]int, max) // all zero by default
+    seen := make(map[int]int)
+    for n := 0; n < max-1; n++ {
+        if m, ok := seen[a[n]]; ok {
+            a[n+1] = n - m
+        }
+        seen[a[n]] = n
+    }
+    fmt.Println("The first ten terms of the Van Eck sequence are:")
+    fmt.Println(a[:10])
+    fmt.Println("\nTerms 991 to 1000 of the sequence are:")
+    fmt.Println(a[990:])
+}