NSMutable Exercise, Objective-C

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//gcc 5.0.4

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[])
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    
    
    NSMutableSet *repairingCars = [NSMutableSet setWithObjects:@"i20",@"i10",@"BMW",nil];
    NSMutableSet *repairedCars = [NSMutableSet setWithObjects:@"XUV300",@"XUV500",@"TUV300",nil];
    NSMutableSet *resellCars = [NSMutableSet setWithObjects:@"XUV300",@"i20",nil];
    NSMutableSet *soldoutCars = [NSMutableSet setWithObjects:@"TUV300",nil];
  
    NSLog(@"%@",repairingCars);
    NSLog(@"%@",repairedCars);
    
    [repairingCars removeObject:@"i20"];
    [repairedCars addObject:@"i20"];
    
    NSLog(@"%@",repairingCars);
    NSLog(@"%@",repairedCars);
    
    for(NSString *repairingCar in repairingCars)
    {
        NSLog(@"%@",repairingCar);
    }
    for(NSString *repairedCar in repairedCars)
    {
        NSLog(@"%@",repairedCar);
    }
    
    NSLog(@"%@",resellCars);
    
  
    NSLog(@"%d",[resellCars intersectsSet:repairedCars]);
    
    [repairedCars minusSet:resellCars];
    NSLog(@"%@",repairedCars);
    
    
    
    [pool drain];
    return 0;
}

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Compilation time: 0.33 sec, absolute running time: 0.11 sec, cpu time: 0.07 sec, memory peak: 9 Mb, absolute service time: 0,46 sec