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Problem 1786. -- [Ahoi2008]Pair 配对 -- 衡阳八中OJ离线版-2014-11-04
1786: [Ahoi2008]Pair 配对
Time Limit:
10 Sec
Memory Limit:
64 MB
Submit:
452
Solved:
275
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Description
Input
Output
Sample Input
5 4
4 2 -1 -1 3
Sample Output
4
HINT
Source
Day1
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