谓词，如果我们输入6作为参数，则生成A= 6，B= 0...A= 4，B= 2...A= 2，B= 4...A= 0，B=6，结束

def generate_values(n):
    result = []
    for i in range(n+1):
        a = n - 2*i
        b = 2*i
        result.append((a, b))
    return result

values = generate_values(6)
for a, b in values:
    print(f"A = {a}, B = {b}")

A = 6, B = 0
A = 4, B = 2
A = 2, B = 4
A = 0, B = 6