diff --git a/goombastacks.py b/goombastacks.py
new file mode 100644
index 0000000..58f428c
--- /dev/null
+++ b/goombastacks.py
@@ -0,0 +1,9 @@
+n = int(input())
+g_total = 0
+for _ in range(n):
+    g, b = map(int, input().split())
+    g_total += g
+    if b > g_total:
+        print("impossible")
+        exit()
+print("possible")