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Cod sursa(job #425712)
#include<cstdio>
int n,a[101];
void cit();
void rez(int n);
void afis(int x);
void cit()
{
scanf("%d",&n);
int i,x;
for(i=1; i<=n; i++)
{ scanf("%d",&x);
rez(x);
}
}
void init()
{
int i,j;
for(i=1; i<=100; i++)
{
a[i]=i%10;
for(j=1; j<=i-1; j++)
a[i]=a[i]*i%10;
}
}
void rez(int n)
{
int i,s=0;
for(i=0; i<=n; ++i)
s= ( s + (a[i%100]) ) %10;
afis(s);
}
void afis(int s)
{
printf("%d\n",s);
}
int main()
{
freopen("cifra.in","r",stdin);
freopen("cifra.out","w",stdout);
init();
cit();
return 0;
}