finds the park slot which is furthest to nearest car
Program wants a size for a square parking slot. For example, if you want a parking area with the size of 20x20 (400cars), you can enter size as 20. Maximum size is defined as 50.
Program wants the number of parked cars in the area. You should enter valid number for parking area, you cannot park 10 cars in a 3x3, program outputs "No slot found".
Program asks this for each parked car. You should enter valid X and Y coordinates for cars. If you enter a location which is out of parking area, program doesn't warn you.
Program outputs the furthest slot to nearest car. This is the slot which is easiest and safest position to park.