#include <iostream>
#include <cstdlib>
using namespace std;

int Cmp(const void *lhs, const void *rhs) {
    return ((const int *)lhs)[1]-((const int *)rhs)[1];
}
int main() {
	int a[3][2] = {{0,3},{1,2},{2,1}};
    qsort(a,3,sizeof(a[0]),Cmp);
    for (int i = 0; i < 3; i++) {
      cout << a[i][0] << ' ' << a[i][1] << endl;
    }
	return 0;
}