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Answers

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)
Total Submission(s): 766    Accepted Submission(s): 471


Problem Description
 

Sample Input
2 4
2 2
2 1
0 1 2 3
 

Sample Output
NO
YES
YES
YES
 

Source
2013 Multi-University Training Contest 10
 

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