Added houseRobber solution

Author: nhistory

house-robber/nhistory.js

@@ -0,0 +1,16 @@
+var rob = function (nums) {
+  // dynamic programming
+  let prev = 0,
+    curr = 0;
+
+  for (let num of nums) {
+    let temp = curr;
+    curr = Math.max(num + prev, curr);
+    prev = temp;
+  }
+
+  return curr;
+};
+
+// TC: O(n)
+// SC: O(1)