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#include <fstream>
#include <string.h>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
char ch, s[102];
void citire(short &x)
{f.get(s,101);
if (strlen(s)==1)
x=s[0]-'0';
else
{x=(s[strlen(s)-2]-'0')*10 + (s[strlen(s)-1]-'0');
}
f.get();
}
int T, i;
short x, v[101];
int main()
{v[0]=0;
for (i=1; i<=99 ; i+=20)
{v[i]=(v[i-1]+1)%10; v[i+1]=(v[i]+4)%10; v[i+2]=(v[i+1]+7)%10; v[i+3]=(v[i+2]+6)%10; v[i+4]=(v[i+3]+5)%10; v[i+5]=(v[i+4]+6)%10; v[i+6]=(v[i+5]+3)%10; v[i+7]=(v[i+6]+6)%10; v[i+8]=(v[i+7]+9)%10; v[i+9]=v[i+8];
v[i+10]=(v[i+9]+1)%10; v[i+11]=(v[i+10]+6)%10; v[i+12]=(v[i+11]+3)%10; v[i+13]=(v[i+12]+6)%10; v[i+14]=(v[i+13]+5)%10; v[i+15]=(v[i+14]+6)%10; v[i+16]=(v[i+15]+7)%10; v[i+17]=(v[i+16]+4)%10; v[i+18]=(v[i+17]+9)%10; v[i+19]=v[i+18];
}
f >> T; f.get();
for (i=1 ; i<= T ; i++)
{x=0; citire(x); g << v[x] << endl;}
f.close();
g.close();
return 0;
}