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#include<iostream>
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using namespace std;
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//<2F><>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϵķ<CFB5>Χ
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//<2F><><EFBFBD><EFBFBD>: <20><><EFBFBD><EFBFBD>n<EFBFBD><6E><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <20><>n<EFBFBD><6E><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1<d<=sqrt(n)<29><>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>d.
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//֤<><D6A4>: <20><><EFBFBD><EFBFBD>n<EFBFBD><6E><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD>ɶ<EFBFBD><C9B6><EFBFBD>n<EFBFBD><6E>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>d<EFBFBD><64><EFBFBD><EFBFBD>1<d<n.
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//<2F><><EFBFBD><EFBFBD>d<EFBFBD><64><EFBFBD><EFBFBD>sqrt(n), <20><>n/d<><64><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1<n/d<=sqrt(n)<29><>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>.
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//<2F><><EFBFBD><EFBFBD>:
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bool isPrime(int n)
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{
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if(n < 2) return false;
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if(n == 2) return true;
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if(n % 2 == 0) return false;
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for(int i = 3; i*i <= n; i += 2)
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if(n%i == 0) return false;
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return true;
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}
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//ʱ<>临<EFBFBD>Ӷ<EFBFBD>O(sqrt(n)/2), <20>ٶ<EFBFBD><D9B6><EFBFBD><EFBFBD><EFBFBD>O((n-sqrt(n))/2).
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int main()
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{
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for(int i=0;i<100;i++)
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{
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if(isPrime(i))
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{
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cout<<i<<endl;
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}
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}
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return 0;
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}
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