diff --git a/code_study/Baekjoon/python/2997.py b/code_study/Baekjoon/python/2997.py
new file mode 100644
index 0000000..dab6224
--- /dev/null
+++ b/code_study/Baekjoon/python/2997.py
@@ -0,0 +1 @@
+print((lambda a, b, c : c + (c - b) if a+c == 2*b else (a + c) - b)(*sorted(list(map(int, input().split())))))
\ No newline at end of file