p
s
x
x
fac
0
s
0
fac
s
x
times
s
x
fac
p
s
x
2.2
fac
s
x
p
s
x
fac
s
x
fac
p
s
x
true
fac
s
x
fac
p
s
x
true
fac
1
1
s
1
1
1
p
1
0
p
1
0
0
0
0
times
2
0
fac
1
0
s
1
1
2438
p
1
1
p
1
1
0
0
0
0
times
2
2
1
fac
1
1
p
s
x
x
fac
s
x
p
s
x
false
NaTT
certifiable-1.6