diff --git "a/JaeIn/202507/31 BAJ \353\271\227\353\254\274.md" "b/JaeIn/202507/31 BAJ \353\271\227\353\254\274.md"
new file mode 100644
index 0000000..efcfc12
--- /dev/null
+++ "b/JaeIn/202507/31 BAJ \353\271\227\353\254\274.md"	
@@ -0,0 +1,19 @@
+```python
+H , W = map(int, input().split())
+blocks = list(map(int, input().split()))
+
+sum = 0
+
+for i in range(1 ,len(blocks) - 1):
+    left = max(blocks[:i])
+    right = max(blocks[i:])
+
+    rain = min(left ,right) - blocks[i]
+
+    if rain > 0:
+        sum += rain
+
+
+print(sum)
+
+```