NSMutableset(add/remove,Etraction,Intersect), 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];
   
    //creating Mutable Set
    NSMutableSet *reparing= [NSMutableSet setWithObjects:@"Ferrari",@"Lamborghini",nil];
    NSMutableSet *repaired= [NSMutableSet setWithObjects:@"BMW",@"AUDI",@"RR",nil];
    NSMutableSet *resell= [NSMutableSet setWithObjects:@"RR",@"Tesla",@"BMW",nil];
    NSMutableSet *sold= [NSMutableSet setWithObjects:@"Ford",@"Jaguar",nil];
    NSMutableSet *result = [NSMutableSet setWithCapacity:10];
    
    NSLog(@"Repairing:%@",reparing);
    NSLog(@"repaired:%@",repaired);
    
   
    //Etration
    for( NSString *Reparing in reparing )
    {
             NSLog(@"%@",Reparing);
    }
    
    
    //Add/Remove Object
    [reparing removeObject:@"Ferrari"];
    [repaired addObject:@"Ferrari"];
    
    NSLog(@"Repairing:%@",reparing);
    NSLog(@"repaired:%@",repaired);
    
    //intersection
    [result setSet:resell];
    [result intersectSet:reparing];
    NSLog(@"result:%@",result);
       
    
    [pool drain];
    return 0;
}

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Compilation time: 0.33 sec, absolute running time: 0.11 sec, cpu time: 0.06 sec, memory peak: 9 Mb, absolute service time: 0,45 sec