class CupO {                                           
    static float ratio;                                
    int amount;                                        
    char drinker = '?';                                
    static void setRatio(float f) {                    
        ratio = f;                                     
    }                                                  
    CupO() {                                           
    }                                                  
    CupO(char c) {                                     
        drinker = c;                                   
    }                                                  
    void drink() {                                     
        drink(5);                                      
    }                                                  
    void drink(int i) {                                
        amount -= i;                                   
    }                                                  
    String status() {                                  
        String s = "amount=" + amount;                 
        if (drinker != '?') s += " drinker=" + drinker;
        return s;                                      
    }                                                  
}