1
0
--
2
0
0
easy
10
25min
1
0
easy
18
1
0
easy
1
0
0
easy
10
0
0
easy
12
50min
0
0
easy
4
0
0
easy
1
0
0
easy
25
1
0
--
2
0
0
easy
10
0
0
easy
15