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Problem H: 特定倍数和
Problem H: 特定倍数和
[Creator :
]
Time Limit :
1.000
sec
Memory Limit :
128 MiB
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ProblemList
Solved: 35
Submit Num: 48
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Description
在1~n中,所有3的倍数的数字之和是多少?
Sample Input
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20
Sample Output
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63