// logical problem
// lp0405.c
#include <stdio.h>

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

  int a = 2 | 4 ;
  int b = 010 | 0100 ;

  if (a == b) {
    printf("a: %d  b: %d\n", a, b);
  } else {
    printf("a-b: %d\n", a - b);
  }
}