diff --git a/jusia b/jusia
new file mode 100644
index 0000000000..536e4ce4b6
--- /dev/null
+++ b/jusia
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.17;
+
+contract ArraysExercise {
+    uint[] numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+    uint[] timestamps;
+    address[] senders;
+
+    uint256 constant Y2K = 946702800; 
+
+    function getNumbers() external view returns (uint[] memory) {
+        uint[] memory results = new uint[](numbers.length);
+
+        for(uint i=0; i<numbers.length; i++) {
+            results[i] = numbers[i];
+        }
+
+        return results;
+    }
+
+    function resetNumbers() public {
+        numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+    }
+
+    function appendToNumbers(uint[] calldata _toAppend) public {
+        uint _counter = _toAppend.length;
+        for (uint i; i < _counter; i++) {
+            numbers.push(_toAppend[i]);
+        }
+    }
+
+    function saveTimestamp(uint _unixTimestamp) public {
+        timestamps.push(_unixTimestamp);
+        senders.push(msg.sender);
+    }
+
+    function afterY2K() public view returns (uint256[] memory, address[] memory) {
+
+      uint256 counter = 0;
+
+      for (uint i = 0; i < timestamps.length; i++) {
+           if (timestamps[i] > Y2K) {
+               counter++;
+           }
+      }
+
+        uint256[] memory timestampsAfterY2K = new uint256[](counter);
+       address[] memory sendersAfterY2K = new address[](counter);
+
+        uint256 index = 0;
+
+        for (uint i = 0; i < timestamps.length; i++) {
+            if (timestamps[i] > Y2K) {
+                timestampsAfterY2K[index] = timestamps[i];
+                sendersAfterY2K[index] = senders[i];    
+                index++;
+            }
+       }
+
+        return (timestampsAfterY2K, sendersAfterY2K);  
+    }
+
+    function resetSenders() public {
+        delete senders;
+    }
+
+    function resetTimestamps() public {
+        delete timestamps;
+    }
+}
+