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Steppe on It

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English

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Time limit
3000 ms
Memory limit
2048 MB (no extra memory)
Submissions
0
Correct
0
Solved by
0
AC rate
—

Statement

Steppe on It, page 1

Steppe on It, page 2

Examples

Sample input 1
6 2
1 8
2 7
2 7
3 6
3 5
Sample output 1
8
Sample input 2
3 3
1 1000
2 1000
Sample output 2
0

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