int main(int argc, char *argv[])
{
int n;
scanf("%d", &n);
printf("%s\n", last_digit(n));
return 0;
}
int main()
{
int t;
int a, b;
scanf("%d", &t);
while (t--){
scanf("%d %d", &a, &b);
if (b == 0 || a == 1)
printf("1\n");
else
if (a == 0)
printf("0\n");
else
printf("%d\n", last_digit(a, b));
}
return 0;
}
bool bignum::isDivisibleBySeven() const
{
if (decimalCount > 0)
return false;
bignum temp(getConverted(10).absolute());
if (temp == 7)
return true;
if (temp < 10)
return false;
bignum last_digit(temp.getDigit(ONES_PLACE));
bignum rest_of_digits = temp - last_digit;
rest_of_digits.rightShift(1);
bignum new_test(rest_of_digits - (last_digit * 2));
return new_test.isDivisibleBySeven();
}
