How to implement this algorithm?

How to implement this algorithm?

[KSSV]

What have you tried so far?

[Barry Allen]

clc
close all
T=1;
tow_min=0;
tow_max=T;

while (tow_max-tow_min > 0.8)
    tow_bar=(tow_max+tow_min)/2;
    if crn(tow_bar)==crn(tow_min)
        tow_min=tow_bar;
    else
        tow_max=tow_bar;
    end
end
tow0=tow_bar;

i have done this far and i dont understand how to obtain the time from this algorithm

[darova]

I think this line should be changed:

% if crn(tow_bar)==crn(tow_min)
if crn(tow_bar) < 0