穷举法，百钱百鸡问题。鸡翁一，值钱五；鸡母一，值钱三；鸡雏三，值钱一；百钱买百鸡，翁、母、雏各几何？ **输出格式要求："%2d:cock=%2d hen=%2d chicken=%2d\n"

for cock in range(0, 21):
    for hen in range(0, 34):
        chicken = 100 - cock - hen
        if (5 * cock + 3 * hen + chicken // 3) == 100 and chicken % 3 == 0:
            print("-:cock={0} - hen={1} - chicken={2}".format(cock, hen, chicken))

输出结果为：

-:cock=0 - hen=25 - chicken=75
-:cock=4 - hen=18 - chicken=78
-:cock=8 - hen=11 - chicken=81
-:cock=12 - hen=4 - chicken=84