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咳什么都不说了

Posted by Essence_me at 2005-09-10 11:54:29 on Problem 2346
In Reply To:怎么还是WA呢?想不通啊 Posted by:Essence_me at 2005-09-10 11:30:55
> #include <stdio.h>
> #include <math.h>
> #include <stdlib.h>
> #include <memory.h>
> int num[100000],max;
> void work(int i)
> {
> 	int sum=0;
> 	while(i>0)
> 	{
> 		sum+=i%10;
> 		i/=10;
> 	}
> 	num[sum]++;
>     if(sum>max)max=sum;
> }
> 
> int main()
> {
> 	int k1,k2,n,i;
> 	long sum;
> 	scanf("%d",&n);
> 	max=0;
> 	memset(num,0,sizeof(int)*((int)exp(n/2*log(10))-1));
> 	for(i=0;i<exp((n/2)*log(10))-1;i++)
> 	{
> 		work(i);
> 	}
> 	sum=0;	
> 	for(i=0;i<=max;i++)
> 	{
> 		sum+=num[i]*num[i];
> 	}
> 	printf("%ld\n",sum);
> 	system("PAUSE");
> }

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