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Re:简单易懂代码,就是效率低了点。

Posted by tongbizhenniu at 2012-01-29 23:50:53 on Problem 2262
In Reply To:简单易懂代码,就是效率低了点。 Posted by:20110706 at 2011-12-13 20:41:56
> #include<iostream>
> using namespace std;
> int isprime(int num)
> {
> 	for(int i=2;i*i<=num;i++)
> 		if(num%i==0)
> 			return 0;
> 	return 1;
> }
> int main()
> {
> 	int m;
> 	while(cin>>m&&m)
> 	{
> 		for(int i=2;i<=m/2;i++)
> 			if(isprime(i)&&isprime(m-i))
> 			{
> 				cout<<m<<" = "<<i<<" + "<<m-i<<endl;
> 				break;
> 			}
> 	}
> }

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