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Cod sursa(job #133533)
#include<fstream.h>
#include<string.h>
int i,t,j,s,k,l,m,n,a,b,c;
char x[100];
int main(){
ifstream f("cifra.in");
ofstream g("cifra.out");
f>>t;
for(i=1;i<=t;i++)
{f>>x;s=0;n=1;
k=strlen(x);
if(k>1)
{
a=x[k-2]-48;
b=x[k-1]-48;
}
else
{b=x[k-1]-48;}
m=a*10+b;
for(l=1;l<=m;l++){
k=m;
k%=4;
if(k==0)
k=4;
for(l=1;l<=k;l++)
n*=b;
s+=n;
s%=10;
}
g<<s<<'\n';
}
f.close();
g.close();
return 0;
}