B - 増減管理 forの中にif文を書くだけです。 N = int(input()) A = [int(input()) for _ in range(N)] for i in range(N - 1): if A[i] == A[i + 1]: print("stay") elif A[i] < A[i + 1]: print("up", A[i + 1] - A[i]) else: print("down", A[i] - A[i + …