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Cod sursa(job #974394)
#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");
long long t,i,p,q,s,j,nr;
int v[101];
char n[101];
int main()
{
for(i=1;i<=100;i++)
{
q=1;
for(j=1;j<=i;j++)
q=(q*i)%10;
s=s+q; s=s%10; v[i]=s;
}
fin>>t;
for(i=1;i<=t;i++)
{
fin>>n;
nr=strlen(n);
if(nr>=2)
nr=(n[nr-2]-'0')*10 + n[nr-1]-'0';
else
nr= n[nr-1]-'0';
fout<<v[nr]<<'\n';
}
return 0;
}