3960: Counting money
内存限制：128 MB
时间限制：1.000 S
评测方式：文本比较
命题人：
提交：8
解决：7
题目描述
Mike earned a lot of paper money through work-study.
Write a program to help him calculate how much money he earned.
Write a program to help him calculate how much money he earned.
输入
The input includes multiple lines of data.
Each line contains 2 positive integers a and b, representing the value and number of banknotes.
When both a and b are equal to 0, the input ends.
Each line contains 2 positive integers a and b, representing the value and number of banknotes.
When both a and b are equal to 0, the input ends.
输出
The output is a positive integer, which is the total money earned by Mike.
样例输入 复制
1 1
2 2
5 1
100 1
0 0样例输出 复制
110