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Problem2709--质数筛法练习 - AABCC
2709: 质数筛法练习 - AABCC
[Creator :
]
Time Limit :
3.000
sec
Memory Limit :
128 MB
Submit
Solved: 3
Submit Num: 7
Statistics
Description
【题意】给定一个整数N(300<=N<=1000000
000000
)
问:有多少个不大于N的整数可以表达成 a*a*b*c*c,其中a、b、c均是质数,并且a<b<c
Sample Input
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1000
Sample Output
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3
Source/Category
质数
筛法
循环嵌套