微软编程一小时_Arithmetic Expression

描述
Given N arithmetic expressions, can you tell whose result is closest to 9?

输入
Line 1: N (1 <= N <= 50000).
Line 2..N+1: Each line contains an expression in the format of "a op b" where a, b are integers (-10000 <= a, b <= 10000) and op is one of addition (+), subtraction (-), multiplication (*) and division (/). There is no "divided by zero" expression.


输出
The index of expression whose result is closest to 9. If there are more than one such expressions, output the smallest index.


样例输入
4
901 / 100
3 * 3
2 + 6
8 - -1
样例输出
2