Project Euler #80: Square root digital expansion

 from decimal import getcontext, Decimal

 def main():
     n = int(raw_input())
     p = int(raw_input())

     getcontext().prec = p+10 # 扩大精度，保证接过
     sum = 0

     for i in range(1,n+1):
         nTemp = Decimal(i).sqrt()
         if nTemp._isinteger() : # 自生函数的判断
             sum += 0
         else:
             nTemp = str(nTemp)
             for _ in range(p+1): # 空下来一个.，所以+1
                 if nTemp[_] != '.':
                     sum += int(nTemp[_])

     print sum

 main()

学习

　　抽象化理解题目

　　边界值问题

错误

　　读题不仔细

Link:

　　https://www.hackerrank.com/contests/projecteuler/challenges/euler080