1
0
easy
1
0
0
easy
10
0
0
easy
12
50min
0
0
easy
4
20min
0
0
easy
4
0
0
easy
4
0
0
easy
12
0
0
easy
10
55min
0
0
medium
10
35min
0
0
easy
1
0
0
medium
6
1h 55min
0
0
easy
25