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