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Count primes

Time Limit: 12000/6000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 3432    Accepted Submission(s): 1734


Problem Description
Easy question! Calculate how many primes between [1...n]!
 

Input
Each line contain one integer n(1 <= n <= 1e11).Process to end of file.
 

Output
For each case, output the number of primes in interval [1...n]
 

Sample Input
2 3 10
 

Sample Output
1 2 4
 

Source
 

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