python 入门

python 入门

1.确定

def ef(l,r,ans):
    while l<=r:
        mid=(l+r)//2
        if mid>ans:
            r=mid-1
        elif mid<ans:
            l=mid+1
        else:
            return True
    return False
print(ef(1,30,19))

结果

2.随机

import random
def suiji(x,ans):
    while x<ans:
        m=random.randint(0,1)
        if m==1:
            x+=1
        else :
            x-=1
        print(x)
    return True
print(suiji(0,19))

结果