#include <stdio.h>

int main(int argc, char* argv[]) {

  int i = 999;
  int j = 666;
  printf("i= %d, j= %d\n", i, j);
  {
    int i = 123;
    int j = i*i;
    printf("i = %d, j= %d\n", i, j);
  }
  printf("i = %d, j = %d\n", i, j);

  return 0;
}