diff --git a/compact_chapoly.py b/compact_chapoly.py
index b5bbd1f..0183f9c 100644
--- a/compact_chapoly.py
+++ b/compact_chapoly.py
@@ -1,7 +1,4 @@
-def u(b):
-	n=0
-	for i in range(len(b)):n|=b[i]<<(i*8)
-	return n
+u=lambda b:sum(b[i]<<(i*8)for i in range(len(b)))
 unu=lambda n,l:bytes(n>>i&255 for i in range(0,l,8))
 add=lambda x,y:x+y&0xffffffff
 rotl=lambda x,n:x<<n&0xffffffff|x>>32-n