Did anybody solve it with numerical algo (local optimization)?

I think using Java is best way.
Firstly I used parameter MaxLen=100 for BigDecimal and Wa3.
Maxlen:=200 and Ac.
Thus to garantie given precision in answer 1e-9 is difficult without long numbers.

I used. just search

2 svr: I've accepted it with usual double in C++

I and begginers must be caution.
A~1e6; A'A~1e12, t^2-Qt+Z=0;Q,Z~1e24;D=Q^2-4*Z~1e+48
how take t with 1e-9 in 16 digits!?

My formula uses only numbers about 10^12 ;)

If you have valid analytic solution to the problem, numbers wouldn't make much difficulty, or so it seems to me.

i used ternary search

Edited by author 22.06.2010 13:54

I solved it using numerical optimization. I've got AC with a code having only 20 lines.