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#35015: python AC


1554101-0@g.puiching.edu.mo (P6A29_1300題了)

d881. 作業苦多 -- CSDC | From: [27.109.151.69] | 發表日期: 2023-05-02 19:16

while True:
    try:
        a = int(input())
        print(int(50+a*(49*50*51/6)-(a-1)*1225))
    except:
        break

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