day 10 ivy tweak

day10/sol.ivy

@@ -4,8 +4,8 @@ op run ins =
     ((1 + ins != 0), 0) sel +\ 1, ins
 
 op signal xs =
-    n = rho xs
+    cycle = iota rho xs
-    i = (20 == (iota n) mod 40) sel iota n
+    i = (20 == cycle mod 40) sel cycle
     +/ xs[i] * i
 
 op render xs =