diff --git a/speedlimit.py b/speedlimit.py
new file mode 100644
index 0000000..90e8de3
--- /dev/null
+++ b/speedlimit.py
@@ -0,0 +1,10 @@
+n = int(input())
+while n > 0:
+    time = 0
+    dist = 0
+    for _ in range(n):
+        s, t = list(map(int, input().split()))
+        dist += s * (t - time)
+        time = t
+    print(f"{dist} miles")
+    n = int(input())