Create 75. Sort Colors.swift

Author: liuchuo

Swift/75. Sort Colors.swift

@@ -0,0 +1,16 @@
+// 75. Sort Colors
+// 12 ms, 68.92%
+func sortColors(_ nums: inout [Int]) {
+    var i0 = 0, i1 = 0, i2 = nums.count-1
+    while i1 <= i2 {
+        if nums[i1] == 2 {
+            nums.swapAt(i1, i2)
+            i2 -= 1
+        } else if nums[i1] == 0 {
+            nums.swapAt(i0, i1)
+            i0 += 1; i1 += 1
+        } else {
+            i1 += 1
+        }
+    }
+}