新增：求最小数字

"""
题目描述：
非负整数 A, 整数B
从A去掉B个数字，使剩下数字最小。
"""
def mini(nlist):
    tmp = 10
    idx = -1
    for i, ele in enumerate(nlist):
        if ele < tmp:
            tmp = ele
            idx = i
    return tmp, idx

class Solution:
    def minimum_num(self, number, n):
        A = list(str(number))
        A = [int(ele) for ele in A]
        if len(A) < n:
            return -1
        res = ""
        idx = 0
        while len(res) < len(A)-n:
            # idx - len(res) + x = n, idx + x = len(res) + n, right = idx + x + 1
            right = n + len(res) + 1
            print(A[idx:right])
            add, addidx = mini(A[idx:right])
            res += str(add)
            print(str(res))
            idx += addidx + 1

        return int(res)

A=1432219
B=3

A = 10200
B = 1

S = Solution()
res = S.minimum_num(A, B)
print(res)