int  p, q, r;
bool s, t, v;

void setup( ){
    Serial.begin(115200);
   p = 11;
   q = 2;
   r = 21;

   s = (p-1) < (q+r);
   t = (r/3) == q;
   v = (s || t) && !t;  

   Serial.print("the result of s is => ");
   Serial.println(s);

   Serial.print("the result of t is => ");
   Serial.println(t);

   Serial.print("the result of v is => ");
   Serial.println(v);
}

void loop( ){
   
  
}