#include <stdio.h>

int main(void) {

  int a = 0, b = 0, 
      c = 2, d = 2;

  a = a + 1; b = b + 1;
  c = c - 1; d = d - 1;

  printf("a: %d, b: %d, c: %d, d: %d\n", a,b,c,d);
  
  return 0;
}