diff --git a/prsteni.py b/prsteni.py
new file mode 100644
index 0000000..570c1f3
--- /dev/null
+++ b/prsteni.py
@@ -0,0 +1,22 @@
+import math
+
+n = int(input())
+radii = list(map(int, input().split()))
+
+prev_r = None
+prev_n = 1
+prev_d = 1
+for r in radii:
+    if prev_r is None:
+        prev_r = r
+        continue
+
+    n = prev_r * prev_n
+    d = r * prev_d
+    gcd = math.gcd(n, d)
+    n = n // gcd
+    d = d // gcd
+    print(f"{n}/{d}")
+    prev_n = n
+    prev_d = d
+    prev_r = r