#define NDEBUG

#include <iostream>
#include <cassert>

using std::cout;
using std::endl;

void printPositiveInt(int x) {
	assert(x >= 0);
	
	cout << x << endl;
}

int main() {
	printPositiveInt(2);
	printPositiveInt(10);
	printPositiveInt(-1);

	return (0);	
}