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Cod sursa(job #754960)
#include<fstream>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
int r,n,c,t,q,i;
int main()
{f>>q;
for(i=1;i<=q;++i)
{f>>n;
r=n%20;
c=n/20;
if(r==0)
t=0;
else
if(r==1||r==17)
t=1;
else
if(r==3||r==70)
t=2;
else
if(r==5||r==14)
t=3;
else
if(r==12||r==16||r==19)
t=4;
else
if(r==2||r==18)
t=5;
else
if(r==9||r==10||r==13)
t=7;
else
if(r==4||r==8||r==11||r==15)
t=8;
else
if(r==6)
t=9;
c=c*4+t;
c=c%10;
g<<c<<'\n';
}
return 0;
}