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Wireless is the New Fiber

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English

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Time limit
2000 ms
Memory limit
2048 MB (no extra memory)
Submissions
0
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Statement

Wireless is the New Fiber, page 1

Wireless is the New Fiber, page 2

Examples

Sample input 1
7 11
0 1
0 2
0 5
0 6
1 3
2 4
1 2
1 2
1 5
2 6
5 6
Sample output 1
3
7 6
0 1
0 2
0 5
0 6
3 6
4 6
Sample input 2
4 3
0 1
2 1
2 3
Sample output 2
0
4 3
2 1
1 3
0 2

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