hdu 2578 Dating with girls(1) 满足条件x+y=k的x,y有几组

Dating with girls(1) Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5709    Accepted Submission(s): 1855 Problem Description Everyone in the H

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