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没有理由啊!这样也能过哈!#include<iostream.h>
#include<iomanip.h>
int main()
{
int n,i;
while(cin>>n)
{
int m=1;
for(i=1;i<=n;i++)
{
m=m*i;
if(m%10==0)
while(m%10==0)
m=m/10;
m=m%100000;
}
cout<<setw(5)<<n<<" -> "<<m%10<<endl;
}
return 0;
}
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