class ParkingSystem {
    int b = 0;
    int m = 0;
    int s = 0;
        
    public ParkingSystem(int big, int medium, int small) {
        b = big;
        m = medium;
        s = small;       
    }
    
    public boolean addCar(int carType) {
        
        if (carType == 1 && b > 0) {
            b--; 
            return true;    
        }
        if (carType == 2 && m > 0) {
             m--;; 
            return true;    
        }
        if (carType == 3 && s > 0) {
             s--; 
            return true;     
        }
        return false;
        
    }
}

/**
 * Your ParkingSystem object will be instantiated and called as such:
 * ParkingSystem obj = new ParkingSystem(big, medium, small);
 * boolean param_1 = obj.addCar(carType);
 */

class ParkingSystem {
    private int[] size;
    public ParkingSystem(int big, int medium, int small) {
        this.size = new int[]{big, medium, small};
    }
    
    public boolean addCar(int carType) {
        return size[carType-1]-->0;
    }
}

// 1.we can take 3 variables to hold count of big,med,small counts. here i have taken array of size 3 instead.
// 2.now just use carType-1 as index of the array and check if value present at that index > 0. if yes return true else false.
// 3.apart from that keep on decrementing value present on carType-1 index. since not more than 1000 calls cannot be made value decremented cannot go out of range.