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2026-07-31 Problems

Beginner
9
4
1
5
2
7
1
8
2
7
6
4
5
1
2
7
9
6
4
2
7
1
4
5
3
8
2
9
6
3
8
2
7
9
6
1
9
6
4
1
8
Intermediate
7
6
4
3
8
5
2
6
4
9
4
6
5
7
8
4
3
8
1
3
2
4
9
1
5
6
5
7
4
1
2
Advanced
3
4
7
1
2
3
5
4
3
1
8
9
5
8
6
3
1
4
6
2
6
4
9
9
7