15x15 puzzle
Time:
3 1
2
3 3 1
3
2
4
3
4
2
1
3
2
1
3
3
2
2
2
3
9 3
5
3
4
3
2
11
1  10
2  1  1  4
1  2  2
6  3
8  3
13
10
4
 
 
 
 
 
 
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