Data commit

Task/Casting-out-nines/D/casting-out-nines.d

@@ -0,0 +1,27 @@
+import std.stdio, std.algorithm, std.range;
+
+uint[] castOut(in uint base=10, in uint start=1, in uint end=999999) {
+    auto ran = iota(base - 1)
+               .filter!(x => x % (base - 1) == (x * x) % (base - 1));
+    auto x = start / (base - 1);
+    immutable y = start % (base - 1);
+
+    typeof(return) result;
+    while (true) {
+        foreach (immutable n; ran) {
+            immutable k = (base - 1) * x + n;
+            if (k < start)
+                continue;
+            if (k > end)
+                return result;
+            result ~= k;
+        }
+        x++;
+    }
+}
+
+void main() {
+    castOut(16, 1, 255).writeln;
+    castOut(10, 1, 99).writeln;
+    castOut(17, 1, 288).writeln;
+}