From 3ec732c698ff8d6ed54e9d421109df3c571a7323 Mon Sep 17 00:00:00 2001
From: Rronny01 <72240947+Rronny01@users.noreply.github.com>
Date: Fri, 1 Oct 2021 17:19:01 +0530
Subject: [PATCH] Tapping Rain Water Solution

---
 Python/tapping_rain_water.py | 41 ++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Python/tapping_rain_water.py

diff --git a/Python/tapping_rain_water.py b/Python/tapping_rain_water.py
new file mode 100644
index 00000000..873e36f7
--- /dev/null
+++ b/Python/tapping_rain_water.py
@@ -0,0 +1,41 @@
+import sys
+ 
+ 
+# Function to find the amount of water that can be trapped within
+# a given set of bars in linear time and extra space
+def trap(bars):
+ 
+    n = len(bars)
+    if n <= 2:
+        return 0
+ 
+    water = 0
+ 
+    # `left[i]` stores the maximum height of a bar to the left
+    # of the current bar
+    left = [None] * (n - 1)
+    left[0] = -sys.maxsize
+ 
+    # process bars from left to right
+    for i in range(1, n - 1):
+        left[i] = max(left[i - 1], bars[i - 1])
+ 
+    # `right` stores the maximum height of a bar to the right
+    # of the current bar
+    right = -sys.maxsize
+ 
+    # process bars from right to left
+    for i in reversed(range(1, n - 1)):
+        right = max(right, bars[i + 1])
+ 
+        # check if it is possible to store water in the current bar
+        if min(left[i], right) > bars[i]:
+            water += min(left[i], right) - bars[i]
+ 
+    return water
+ 
+ 
+if __name__ == '__main__':
+ 
+    heights = [7, 0, 4, 2, 5, 0, 6, 4, 0, 5]
+    print("The maximum amount of water that can be trapped is", trap(heights))