Data commit

Task/Population-count/Nim/population-count-1.nim

@@ -0,0 +1,28 @@
+import bitops
+import strformat
+
+var n = 1
+write(stdout, "3^x   :")
+for i in 0..<30:
+  write(stdout, fmt"{popcount(n):2} ")
+  n *= 3
+
+var od: array[30, int]
+var ne, no = 0
+n = 0
+write(stdout, "\nevil  :")
+while ne + no < 60:
+  if (popcount(n) and 1) == 0:
+    if ne < 30:
+      write(stdout, fmt"{n:2} ")
+      inc ne
+  else:
+    if no < 30:
+      od[no] = n
+      inc no
+  inc n
+
+write(stdout, "\nodious:")
+for i in 0..<30:
+  write(stdout, fmt"{od[i]:2} ")
+write(stdout, '\n')

Task/Population-count/Nim/population-count-2.nim

@@ -0,0 +1,12 @@
+import bitops, math, sequtils, strutils
+
+const
+  N = 30
+  popcounts = toSeq(0..<N).mapIt(popcount(3^it))
+  mapping = toSeq(0..<(2 * N)).mapIt((it, it.popcount))
+  evil = mapping.filterIt((it[1] and 1) == 0).mapIt(it[0])
+  odious = mapping.filterIt((it[1] and 1) != 0).mapIt(it[0])
+
+echo "3^n:   ", popcounts.mapIt(($it).align(2)).join(" ")
+echo "evil:  ", evil.mapIt(($it).align(2)).join(" ")
+echo "odious:", odious.mapIt(($it).align(2)).join(" ")