right
case a.mp.inr
t : ℕ
P : ℕ → ℕ
h✝ : Balanced t P
a : ℕ
ha : a ∈ range (t + 1)
h : P a = minP t P + 1
⊢ a ∈ range (t + 1) ∧ P a = minP t P ∨ a ∈ range (t + 1) ∧ P a = minP t P + 1
case a.mp.inr.h
t : ℕ
P : ℕ → ℕ
h✝ : Balanced t P
a : ℕ
ha : a ∈ range (t + 1)
h : P a = minP t P + 1
⊢ a ∈ range (t + 1) ∧ P a = minP t P + 1