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Cod sursa(job #111929)
#include <fstream.h>
#include <math.h>
int main(){
ifstream in("cifra.in");
ofstream out("cifra.out");
int v[21];
v[0]=0;
int i,t,a,j;
for(i=1;i<=20;i++){
if(i%4==0)
a=(v[i-1]+pow(i,4));
else
a=(v[i-1]+pow(i,i%4));
a=a%10;
v[i]=a;
}
long long n;
in>>t;
for(i=0;i<t;i++){
in>>n;
a=0;
if(n>20){
for(j=1;j<20;j++){
a+=v[j]*(n-j)/20;
a=a%10;
}
out<<a;
}else{
out>>v[n];
}
out<<"\n";
}
in.close();
out.close();
return 0;
}