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#20773: 一種想法


Easonsfriend (去寫./Problems?ownerid=89827)

c669. missing and duplicate -- it's david | From: [106.105.188.90] | 發表日期: 2020-03-03 21:11

int d[3]={seq[1]-seq[0],seq[2]-seq[1],seq[3]-seq[2]};

        sort(d,d+3);

//d[1] 即是公差

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