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Cod sursa(job #374893)
#include<fstream.h>
ifstream fin("cifra.in");
ofstream fout("cifra.out");
unsigned t,i,n,s,j,jw,p,l;
int main(){
fin>>t;
for(i=1;i<=t;i++){
fin>>n;
s=0;
for(j=1;j<=n;j++){/*
if(j%10==5 || j%10==6 || j%10==9 || j%10==1) s=s+j%10;
else if(j%10==4) s=s+6;
else{
if(jw%10==2){
if(jw%4==2) s=s+4;
else s=s+6;
}
else if(jw%10==3){
if(jw%4==1) s=s+3;
else s=s+7;
}
else if(jw%10==7){
if(jw%4==1) s=s+7;
else s=s+3;
}
else{
if(jw%4==2) s=s+4;
else s=s+6;
}*/
p=1;
for(l=1;l<=j;l++)
p=p*j;
s=s+p;
}
fout<<s%10<<'\n';
}
fin.close();
fout.close();
return 0;
}