题解 | #缺失的第一个正整数#

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param nums int整型一维数组 
# @return int整型
#
class Solution:
    def minNumberDisappeared(self , nums: list[int]) -> int:
        # write code here
        hash = {}
        for num in nums:
            hash[num] = 1
        i = 1
        while True:
            if i not in hash:
                return i
            i += 1