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读一个,给个答案,不需要把答案放一起统一输出In Reply To:大家帮我看看这个代码 为什么会超时呢?? Posted by:Lemke at 2009-11-08 11:18:54 > #include<stdio.h>
> #include<math.h>
> int prime(int x,int a[])
> {
> int i,j,flag,k=0;
> for(i=2;i<=x;i++)
> {
> flag=1;
> for(j=2;j<=sqrt(i);j++)
> {
> if(i%j==0)
> {
> flag=0;break;
> }
> }
> if(flag)
> {
> a[k]=i;k++;
> }
> }
> return k;
> }
> int count(int x)
> {
> int a[170],sum[170];
> int i,j,done=0;
> int n=prime(x,a);
> for(i=0;i<n;i++)
> {
> sum[i]=0;
> for(j=i;(j<n)&&(sum[i]<x);j++)
> {
> sum[i]=sum[i]+a[j];
> if(sum[i]==x)
> {
> done++;
> break;
> }
> }
> }
> return done;
> }
>
>
> main()
> {
> int t[10],i=0;
> int x,j;
> while(x)
> {
> scanf("%d",&x);
> t[i]=count(x);i++;
> }
> for(j=0;j<i-1;j++)
> {
> printf("%d\n",t[j]);
> }
>
>
> }
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