python求和

We are going to design a special sum series function which has following characteristics:

我们将设计一个特殊的求和系列函数，该函数具有以下特征：

    f(0) = 0
f(1) = 1
f(2) = 1
f(3) = 0
f(x) = f(x-1) + f(x-3)

Python solution of the above sum series

上述sum系列的Python解决方案

# function to find the sum of the series
def summ(x):
if x == 0:
return 0
if x == 1:
return 1
if x == 2:
return 1
if x == 3:
return 0
else:
return summ(x-1) + summ(x-4)
# main code
if __name__ == '__main__':
# finding the sum of the series till given value of x
print("summ(0) :", summ(0))
print("summ(1) :", summ(1))
print("summ(2) :", summ(2))
print("summ(3) :", summ(3))
print("summ(10):", summ(10))
print("summ(14):", summ(14))

Output

输出量

summ(0) : 0
summ(1) : 1
summ(2) : 1
summ(3) : 0
summ(10): 5
summ(14): 17

翻译自: https://www.includehelp.com/python/find-the-solution-of-a-special-sum-series.aspx

python求和