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解题思路:

注意事项:

参考代码:

x,y=map(int,input().strip().split())                            #输入头，脚数量
chicken_foot=2*x                            #假设全是鸡，一只鸡两条脚
many_foot=y-chicken_foot                            #y总脚数-chicken_foot鸡脚数 就会得出多的脚数
foot=4-2                                #4代表兔子脚数，2代表鸡的脚数 兔子比鸡多两个脚
rabbit=many_foot//foot                            #多出来的脚 除以 兔子比鸡多出的两个脚
chicken=x-rabbit                            #总头数-兔子数
print(chicken,rabbit)

x,y=map(int,input().split())
for chicken in range(x+1):
    rabbit=x-chicken
    if (chicken*2+rabbit*4==y):
        break
print(chicken,rabbit)