#include <stdio.h>
#include <stdlib.h>

int main(int argc, char ** argv) {
  if (argc < 2) {
    fprintf(stderr, "usage: %s <N>\n", argv[0]);
    return(1);
  }
  double N = atof(argv[1]);
  for (double x=0; x<N; x++) {
    printf("%.0f %.0f\n", x, x*x);
  }
  return (0);
}