[MEDIUM]
7
3
9
8
9
6
4
5
4
8
2
3
1
6
4
5
8
3
3
8
2
5
2
6
8
1
6
7
5
2
Solution
7
6
2
1
4
3
8
9
5
8
1
3
7
5
9
2
6
4
5
9
4
8
6
2
3
7
1
6
3
9
4
2
7
5
1
8
2
4
8
5
9
1
7
3
6
1
5
7
3
8
6
9
4
2
3
7
5
2
1
4
6
8
9
9
2
1
6
3
8
4
5
7
4
8
6
9
7
5
1
2
3
>> NEW:
easy
medium
hard
>> JSON:
easy
medium
hard
>> TXT:
easy
medium
hard
>>
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