6, boring

README.md

@@ -8,4 +8,12 @@ day is visible until you solve it.
 Most solutions output at most two lines, the answers to part 1 and 2; but some
 provide more information in the form of e.g. graphics.
 
-Run a solution by passing the puzzle input to the program.
+Run a solution by passing the puzzle input to the program:
+
+```
+./two.bash < input2
+```
+or
+```
+./five.py -v < test5
+```

input6

@@ -0,0 +1,2 @@
+Time:        47     98     66     98
+Distance:   400   1213   1011   1540

scratch.py

@@ -0,0 +1,6 @@
+#!/usr/bin/env python3
+
+from useful import *
+
+ns = numbers(open(0).read())
+print(max(ns))

sixx.py

@@ -0,0 +1,11 @@
+#!/usr/bin/env python3
+
+from useful import *
+
+ts, ds = [numbers(l) for l in lines(open(0))]
+
+def wins(t, d):
+    return sum(i*(t-i) > d for i in range(t))
+
+print(np.prod([wins(t, d) for (t, d) in zip(ts, ds)]))
+print(wins(*[int(''.join(str(el) for el in ar)) for ar in (ts, ds)]))

test6

@@ -0,0 +1,2 @@
+Time:      7  15   30
+Distance:  9  40  200