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Hi,

I am confused by the phrasing: "If multiple solutions are possible, print the first lexicographically."
What does it mean here? For example, for the input:
1

10
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10

the accepted output is
1 2 3 4 5 6 7 8 9 10


However, my understanding of ...