牛客网 求数列的和
1 import math 2 from decimal import * 3 str1 = input().split() 4 n = int(str1[0]) 5 m = int(str1[1]) 6 list1 = [] 7 for i in range(n,n+m): 8 if i == n: 9 list1.append(n) 10 else: 11 x = math.sqrt(list1[len(list1)-1]) 12 list1.append(x) 13 print(Decimal(str(sum(list1))).quantize(Decimal('0.00')))
