HDU1009：FatMouse' Trade(初探贪心，wait)

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InputThe input consists of multiple test cases. Each test case begins with a line containing two non-negative integers M and N. Then N lines follow, each contains two non-negative integers Jii and Fii respectively. The last test case is followed by two -1‘s. All integers are not greater than 1000. 
OutputFor each test case, print in a single line a real number accurate up to 3 decimal places, which is the maximum amount of JavaBeans that FatMouse can obtain. 
Sample Input

5 3
7 2
4 3
5 2
20 3
25 18
24 15
15 10
-1 -1

Sample Output

13.333
31.500

HDU1009：FatMouse' Trade(初探贪心，wait)

标签：this   1.5   not   thml   http   hdu1009   multiple   oms   mount   

原文地址：http://www.cnblogs.com/Roni-i/p/7159901.html