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Re:110MS,打表。In Reply To:110MS,打表。 Posted by:fym0512 at 2012-07-04 21:01:20 > 1140K 110MS > 如果i是素数,那么判断n-i是否是素数,是的话输出。 > 为神马一开始老wrong answer.不知道原因的情况下再次提交就对了。。神马啊。 > > #include <iostream> > using namespace std; > #define MAX 1000000 > bool prime[MAX+1];//ini false > void judgePrime() > {//==0是素数 > for(int i=2;i*i<=MAX;i++) > if(prime[i]==0) > for(int j=i+i;j<=MAX;j += i) > prime[j]=1; > } > int main() > { > judgePrime(); > while(1) > { > int n; > scanf("%d",&n); > if(n==0) > break; > for(int i=3;i<=n/2;i += 2) > { > if(prime[i]==0 && prime[n-i]==0) > { > printf("%d = %d + %d\n",n,i,n-i); > break; > } > } > } > return 0; > } Followed by: Post your reply here: |
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