#include <stdio.h>
#include <assert.h>
#include <string.h>

void print(int nb)
{
	printf("%c", nb + '0');
}


void ft_putnbr(int nb)
{
	int a;
	int b;

	a = 0;
	b = 0;
	if (nb < 10)
		print(nb);
	else
	{
		ft_putnbr(nb / 10);
		b = nb % 10;
		print(b);
	}
}

int main()
{
	ft_putnbr(4213);
}

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