3 rounds:

30 shoulderpresses + push presses,
2 min rest

Sart with 50 % of your shoulder press 1 RM. Do as many shoulder presses as you can and go on with push presses as long as you have done 30 reps together.

Increase weight as many times as you can to keep the rep count at 30. repeat 3 times with the max weight (number of the shoulder presses may decrease and the push presses may increase).