1603.ParkingSystem.cs

// 1603. Design Parking System
// Design a parking system for a parking lot. The parking lot has three kinds of parking spaces: big, medium, and small, with a fixed number of slots for each size.

// Implement the ParkingSystem class:

// ParkingSystem(int big, int medium, int small) Initializes object of the ParkingSystem class. The number of slots for each parking space are given as part of the constructor.
// bool addCar(int carType) Checks whether there is a parking space of carType for the car that wants to get into the parking lot. carType can be of three kinds: big, medium, or small, which are represented by 1, 2, and 3 respectively. A car can only park in a parking space of its carType. If there is no space available, return false, else park the car in that size space and return true.
 
// Example 1:
// Input
// ["ParkingSystem", "addCar", "addCar", "addCar", "addCar"]
// [[1, 1, 0], [1], [2], [3], [1]]
// Output
// [null, true, true, false, false]
// Explanation
// ParkingSystem parkingSystem = new ParkingSystem(1, 1, 0);
// parkingSystem.addCar(1); // return true because there is 1 available slot for a big car
// parkingSystem.addCar(2); // return true because there is 1 available slot for a medium car
// parkingSystem.addCar(3); // return false because there is no available slot for a small car
// parkingSystem.addCar(1); // return false because there is no available slot for a big car. It is already occupied.

// Constraints:
// 0 <= big, medium, small <= 1000
// carType is 1, 2, or 3
// At most 1000 calls will be made to addCar

public class ParkingSystem {
    int big;
    int medium;
    int small;

    public ParkingSystem(int big, int medium, int small) {
        big = big;
        medimu = medium;
        small = small;
    }
    
    public bool AddCar(int carType) {
        switch (carType)
    {
        case 1:
            if(big > 0){
                big--;
                return true;
            }
            break;  
        case 2:
            if(medium > 0){
                medium--;
                return true;
            }
            break; 
        case 3:
            if(small > 0){
                small--;
                return true;
            }
            break; 
    }
    return false;
    }
}

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