数组开小点就0ms了。。。。囧
#include <cstdio>
#include <cstring>
#define  MAXN 30001
char num[MAXN];
int main()
{
	while(scanf("%s",num)!=EOF)
	{
		int sum=0,n=-1,temp;
		for(unsigned int i=0;i<strlen(num);++i)
		{
			if(num[i]<='9' && num[i]>='0')temp=num[i]-'0';
			else if(num[i]>='A' && num[i]<='Z')temp=num[i]-'A'+10;
			else temp=num[i]-'a'+36;
			sum+=temp;
			if(temp>n)n=temp;
		}
		for(;n<=62;++n)
			if(sum%n==0)
				break;
		if(n>=62)printf("such number is impossible!\n");
		else printf("%d\n",n+1);
	}
	return 0;
}