diff --git a/chapter02/problem_b/solution.py b/chapter02/problem_b/solution.py
new file mode 100644
index 0000000..3e934e8
--- /dev/null
+++ b/chapter02/problem_b/solution.py
@@ -0,0 +1,16 @@
+def is_ordered(data, n):
+	for i in range(n - 1, 0, -1):
+		if data[i-1] > data[i]:
+			return False
+	
+	return True
+
+
+if __name__ == "__main__":
+	n = int(input())
+	data = [ int(w) for w in input().split() ]
+	result = is_ordered(data, n)
+	if result :
+		print("YES")
+	else:
+		print("NO")