void itoa_rec(unsigned long long value) {
char c;
if (value >= 10) {
itoa_rec(value / 10);
}
c = value % 10 + '0';
::write(1, &c, 1);
}
int main()
{
int n, i=0;
char s[9];
scanf_s("%d",&n);
//printd(n);
//printf("\n");
itoa_rec(n, s);
printf(s);
while(getchar() != '\n');
getchar();
return 0;
}
int itoa_rec(int n, char s[])
{
int i;
if (n / 10) {
i = itoa_rec(n / 10, s);
}
else
{
i = 0;
if (n < 0)
{
s[i++] = '-';
}
}
if (n < 0)
{
n *= -1;
}
s[i++] = n % 10 + '0';
s[i] = '\0';
return i;
}
