diff --git a/Day4/part1.cpp b/Day4/part1.cpp
new file mode 100644
index 0000000..4e6b17a
--- /dev/null
+++ b/Day4/part1.cpp
@@ -0,0 +1,33 @@
+#include <iostream>
+#include <string>
+#include <algorithm>
+
+using namespace std;
+
+int main(int argc, char* argv[])
+{
+    int total = 0;
+
+    string line;
+    while(getline(cin, line))
+    {
+        string::size_type n = line.find(',');
+        string half1 = line.substr(0,n);
+        string half2 = line.substr(n+1);
+
+        n = half1.find('-');
+        int half1_start = stoi(half1.substr(0,n));
+        int half1_end = stoi(half1.substr(n+1));
+
+        n = half2.find('-');
+        int half2_start = stoi(half2.substr(0,n));
+        int half2_end = stoi(half2.substr(n+1));
+
+        if ((half1_start <= half2_start && half1_end >= half2_end) ||
+            (half2_start <= half1_start && half2_end >= half1_end))
+        {
+            total++;            
+        }
+    }
+    cout << total << endl;
+}
\ No newline at end of file
diff --git a/Day4/part2.cpp b/Day4/part2.cpp
new file mode 100644
index 0000000..dca6806
--- /dev/null
+++ b/Day4/part2.cpp
@@ -0,0 +1,32 @@
+#include <iostream>
+#include <string>
+#include <algorithm>
+
+using namespace std;
+
+int main(int argc, char* argv[])
+{
+    int total = 0;
+
+    string line;
+    while(getline(cin, line))
+    {
+        string::size_type n = line.find(',');
+        string half1 = line.substr(0,n);
+        string half2 = line.substr(n+1);
+
+        n = half1.find('-');
+        int half1_start = stoi(half1.substr(0,n));
+        int half1_end = stoi(half1.substr(n+1));
+
+        n = half2.find('-');
+        int half2_start = stoi(half2.substr(0,n));
+        int half2_end = stoi(half2.substr(n+1));
+
+        if (!(half1_end < half2_start || half2_end < half1_start))
+        {
+            total++;            
+        }
+    }
+    cout << total << endl;
+}
\ No newline at end of file