Problem 2030. -- [2009国家集训队] 激光坦克 -- 衡阳八中OJ离线版-2014-11-04

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2030: [2009国家集训队] 激光坦克

Time Limit: 10 Sec Memory Limit: 552 MB
Submit: 80 Solved: 27
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Description

Input

Output

Sample Input

10 714066300
122043478 641033841
714066299 635034305
746657703 531637642
923809017 950414613
512044248 945746679
960702607 362415165
985369962 27838545
198374904 283457437
173667857 723287266
944359487 878474416

Sample Output

HINT

Source

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