app
nil
y
y
app
add
n
x
y
add
n
app
x
y
reverse
nil
nil
reverse
add
n
x
app
reverse
x
add
n
nil
shuffle
nil
nil
shuffle
add
n
x
add
n
shuffle
reverse
x
2.2
shuffle
add
n
x
shuffle
reverse
x
reverse
add
n
x
reverse
x
shuffle
add
n
x
reverse
x
app
add
n
x
y
app
x
y
reverse
add
n
x
app
reverse
x
add
n
nil
true
shuffle
add
n
x
shuffle
reverse
x
true
reverse
1
0
reverse
1
1
11798
shuffle
1
0
nil
0
0
app
2
0
shuffle
1
1
0
add
2
2
11799
app
2
1
2
0
reverse
add
n
x
app
reverse
x
add
n
nil
app
nil
y
y
reverse
nil
nil
app
add
n
x
y
add
n
app
x
y
shuffle
add
n
x
reverse
x
false
reverse
add
n
x
reverse
x
true
reverse
1
1
0
reverse
1
1
1
shuffle
1
0
nil
0
0
app
2
0
shuffle
1
1
0
add
2
2
11799
app
2
1
2
0
reverse
add
n
x
app
reverse
x
add
n
nil
app
nil
y
y
reverse
nil
nil
app
add
n
x
y
add
n
app
x
y
reverse
add
n
x
app
reverse
x
add
n
nil
false
app
add
n
x
y
app
x
y
true
reverse
1
0
reverse
1
1
1
shuffle
1
0
nil
0
0
app
2
1
0
shuffle
1
1
0
add
2
2
11799
app
2
1
2
0
reverse
add
n
x
app
reverse
x
add
n
nil
app
nil
y
y
reverse
nil
nil
app
add
n
x
y
add
n
app
x
y
NaTT
certifiable-1.6