1092: 储蓄问题

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:10 Solved:4

Description

小李同学有一些零用钱,他想通过银行储蓄增值,银行一年期存款利率为3%。假设他有a元,想存到b元,请问需要存多少年?

Input

10
11

Output

4

Sample Input Copy

4.5
5.5

Sample Output Copy

7