Hey guys, this is a great song from Kendrick. That sample is pretty ill, yeah? 
Well, here's the notes for that sample. 
You might want to use hammer ons and pull offs, that trumpet is pretty fast... listen to  
the song for timing! 

Play this 

e|-10-12-10-------10----12-10-----------------------| 
B|----------13-10-------------13-10----8-10---------| 
G|--------------------------------------------------| 
D|--------------------------------------------------| 
A|--------------------------------------------------| 
E|--------------------------------------------------| 

Then This 

e|-10-12-10-------10----12-10------------------------| 
B|----------13-10-------------13-10----8-10---10-13--| 
G|---------------------------------------------------| 
D|---------------------------------------------------| 
A|---------------------------------------------------| 
E|---------------------------------------------------| 

The entire note sequence of the sample is as follows: D E D C A D E D C A G A, D E D C A  
D E D C A G A A C. Play it anywhere on the fretboard! 

The background trumpet goes G F# G A. B(maybe a bend?) F# G A 

It may not be absolutely correct, but it's pretty close. 

Either way, very cool riff. Enjoy!