diff --git a/2017/01/2matching-sum.py b/2017/01/2matching-sum.py
new file mode 100755
index 0000000..4c0d9f6
--- /dev/null
+++ b/2017/01/2matching-sum.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+import sys
+
+if __name__ == '__main__':
+
+    try:
+        filename = sys.argv[1]
+    except IndexError:
+        filename = ""
+
+    if filename == "":
+        print("input only digits:")
+        seq = input()
+        string = str(seq)
+    else:
+        with open(filename, "r", encoding="utf-8") as file:
+            string = file.read(9999).strip()
+
+    total = 0
+    length = len(string)
+
+    for i in range(length):
+        if (string[i] == string[(i+int(length/2))%length]):
+            total += int(string[i])
+
+    print(total)