diff --git a/solutions/beecrowd/1099/1099.py b/solutions/beecrowd/1099/1099.py
new file mode 100644
index 00000000..95cd06a6
--- /dev/null
+++ b/solutions/beecrowd/1099/1099.py
@@ -0,0 +1,15 @@
+n = int(input())
+
+
+for _ in range(n):
+    x, y = map(int, input().split())
+    x, y = min(x, y), max(x, y)
+
+    x += 1
+    if x % 2 == 0:
+        x += 1
+
+    s = 0
+    for odd_number in range(x, y, 2):
+        s += odd_number
+    print(s)