Show NSAlert on specific launches

I need to show an NSAlert on the 3rd, 10th and 20th launch of the app, so far I have tried:

/* Note that the kLaunchCount is incremented as 开发者_如何学Goa Number in a dictionary */
if([[[NSUserDefaults standardUserDefaults] objectForKey:@"kLaunchCount"] intValue] == 1||2||3)
{
    /* show the NSAlert */
}

The above code shows the NSAlert every launch.

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That code parses as ...||2||3, which will always return true (since anything || 2 is true). You should put the launch count into a variable n and then use n == 3 || n == 10 || n == 20 as the test.