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够变态..完全凑对的这样也能0S过,太裸了,一点算法性都没有.. #include<iostream> #include<iomanip> using namespace std; int a[10001]; int main() { int n; unsigned long t=1; a[0]=1; for(int i=1;i<10001;i++) { t*=i; while((t%10)==0) t/=10; t%=100000; a[i]=t%10; } while(cin>>n) { int res; res=a[n]; cout<<setw(5)<<n<<" -> "<<res<<endl; } return 0; } Followed by:
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