diff --git a/TaskC00_TODO/solution.py b/TaskC00_TODO/solution.py
new file mode 100644
index 0000000..aa34bba
--- /dev/null
+++ b/TaskC00_TODO/solution.py
@@ -0,0 +1,9 @@
+import re
+import sys
+
+for line in sys.stdin:
+    line = line.strip()
+    if re.match(r'^-?[1-9][0-9]*0$|^-?[1-9][0-9]*5$|^0$', line):
+        print('yes') 
+    else:
+        print('no')