Data commit

Task/Combinations/Nim/combinations-1.nim

@@ -0,0 +1,22 @@
+iterator comb(m, n: int): seq[int] =
+  var c = newSeq[int](n)
+  for i in 0 ..< n: c[i] = i
+
+  block outer:
+    while true:
+      yield c
+
+      var i = n - 1
+      inc c[i]
+      if c[i] <= m - 1: continue
+
+      while c[i] >= m - n + i:
+        dec i
+        if i < 0: break outer
+      inc c[i]
+      while i < n-1:
+        c[i+1] = c[i] + 1
+        inc i
+
+for i in comb(5, 3):
+  echo i

Task/Combinations/Nim/combinations-2.nim

@@ -0,0 +1,22 @@
+iterator combinations(m: int, n: int): seq[int] =
+
+  var result = newSeq[int](n)
+  var stack = newSeq[int]()
+  stack.add 0
+
+  while stack.len > 0:
+    var index = stack.high
+    var value = stack.pop()
+
+    while value < m:
+      result[index] = value
+      inc value
+      inc index
+      stack.add value
+
+      if index == n:
+        yield result
+        break
+
+for i in combinations(5, 3):
+  echo i