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Cod sursa(job #885612)
#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
int a[1000001],T,nrc;
char N[101];
void v1_100()
{
int i,j,k,l=0;
for (i=1;i<=100;i++)
{
k=i;
for(j=1;j<i;j++)
k=(k*i)%10;
l=(l+k)%10;
a[i]=l;
}
}
ifstream fin("cifra.in");
ofstream fout("cifra.out");
int main()
{
fin>>T;
v1_100();
for (int i=1;i<=T;i++)
{
fin>>N;
nrc=strlen(N);
if (nrc>1)
nrc=(N[nrc-2]-'0')*10 + N[nrc-1]-'0';
else
nrc=N[nrc-1]-'0';
fout<<a[nrc]<<'\n';
}
fin.close();
fout.close();
return 0;
}