Digit Number
Problem
Write a program which computes the digit number of sum of two integers a and b.
Input
There are several test cases. Each test case consists of two non-negative integers aand b which are separeted by a space in a line. The input terminates with EOF.
Constraints
- 0 ≤ a, b ≤ 1,000,000
- The number of datasets ≤ 200
Output
Print the number of digits of a + b for each data set.
Sample Input
5 7
1 99
1000 999
Output for the Sample Input
2
3
4
题目大意
读入若干组 a 和 b,输出 a + b 的长度。
题目解读
与 A + B Problem 类似。
算法
循环读入至 EOF,对于每组数据计算结果后,将类型转换为字符串,计算长度。
代码
1 while (1):
2 try:
3 s = input().split()
4 except EOFError:
5 break
6 ans = str(eval(s[0] + "+" + s[1]))
7 print(len(ans))
代码解读
注意:以下内容完全根据笔者自己对 Python 3 的理解胡说八道。
eval():计算函数(?),可以将一个字符串看作表达式进行数学运算。
str():类型转换,将整形数字转换为字符串。
len():可用来查看字符串长度。