Data commit

Task/Numbers-with-equal-rises-and-falls/Go/numbers-with-equal-rises-and-falls.go

@@ -0,0 +1,47 @@
+package main
+
+import "fmt"
+
+func risesEqualsFalls(n int) bool {
+    if n < 10 {
+        return true
+    }
+    rises := 0
+    falls := 0
+    prev := -1
+    for n > 0 {
+        d := n % 10
+        if prev >= 0 {
+            if d < prev {
+                rises = rises + 1
+            } else if d > prev {
+                falls = falls + 1
+            }
+        }
+        prev = d
+        n /= 10
+    }
+    return rises == falls
+}
+
+func main() {
+    fmt.Println("The first 200 numbers in the sequence are:")
+    count := 0
+    n := 1
+    for {
+        if risesEqualsFalls(n) {
+            count++
+            if count <= 200 {
+                fmt.Printf("%3d ", n)
+                if count%20 == 0 {
+                    fmt.Println()
+                }
+            }
+            if count == 1e7 {
+                fmt.Println("\nThe 10 millionth number in the sequence is ", n)
+                break
+            }
+        }
+        n++
+    }
+}