[编程入门]求和训练

解题思路:

注意事项:

参考代码:

a,b,c = map(int,input().split())
sum_1 = 0
sum_2 = 0
sum_3 = 0
for i in range(1,a+1):
   sum_1 = sum_1 + i

for i in range(1,b+1):
   sum_2 = sum_2 + i**2

for i in range(1,c+1):
   sum_3 = sum_3 + 1/i

sum = sum_1 + sum_2 + sum_3
print('%.2f'%sum)