1 files changed, 25 insertions, 0 deletions

diff --git a/2025/02/b.py b/2025/02/b.py
new file mode 100644
index 0000000..8efdbe3
--- /dev/null
+++ b/2025/02/b.py
@@ -0,0 +1,25 @@
+import fileinput
+
+def invk(n, k):
+        for i in range(0, len(n)-k, k):
+                if n[i:i+k] != n[i+k:i+2*k]:
+                        return False
+        return True
+
+def invalid(n):
+        for k in range(1, len(n)//2 + 1):
+                if invk(n, k):
+                        return True
+        return False
+
+s = 0
+with fileinput.input() as lines:
+        for line in lines:
+                for r in line.split(","):
+                        l = r.split("-");
+                        for n in range(int(l[0]), int(l[1])+1):
+                                if invalid(str(n)):
+                                        s += n
+print(s)
+                                
+