1 files changed, 40 insertions, 0 deletions
diff --git a/challenge-079/lubos-kolouch/python/ch-2.py b/challenge-079/lubos-kolouch/python/ch-2.py
new file mode 100644
index 0000000000..31e0534f51
--- /dev/null
+++ b/challenge-079/lubos-kolouch/python/ch-2.py
@@ -0,0 +1,40 @@
+#!/bin/env python
+"""
+===============================================================================
+#
+#         FILE: ch-2.py
+#
+#        USAGE: ./ch-2.py
+#
+#  DESCRIPTION: Perl Weekly Challenge Task 2
+#               https://perlweeklychallenge.org/blog/perl-weekly-challenge-079/
+#               Trapper Rain Water
+#
+#       AUTHOR: Lubos Kolouch
+#==============================================================================
+"""
+
+def trapWater(arr):
+
+    n = len(arr)
+    left = [0]*n
+    right = [0]*n
+
+    water = 0
+
+    left[0] = arr[0]
+    for i in range(1, len(arr)):
+        left[i] = max(left[i-1], arr[i])
+
+    right[n-1] = arr[n-1]
+    for i in range(n-2, -1, -1):
+        right[i] = max(right[i + 1], arr[i])
+
+    for i in range(0, n):
+        water += min(left[i], right[i]) - arr[i]
+
+    return water
+
+assert trapWater([2, 1, 4, 1, 2, 5]) == 6
+assert trapWater([3, 1, 3, 1, 1, 5]) == 6
+