diff --git a/skocimis.py b/skocimis.py
new file mode 100644
index 0000000..fa5d359
--- /dev/null
+++ b/skocimis.py
@@ -0,0 +1,2 @@
+ints = list(map(int, input().split()))
+print(max((ints[1] - ints[0], ints[2] - ints[1]))-1)