I was doing this problem: https://codeforces.me/contest/1730/problem/B and I have submitted 3 versions of binary searching on the answer and all of them are failing on test case 3 (wrong answer 36th numbers differ — expected: '40759558.0000000', found: '40759600.0000000', error = '0.0000010') -- all of them produce the same "wrong" answer.
I might be missing something stupidly obvious here but I am actually losing my mind right now. Could someone take a look at what could be going wrong?
In case you do not want to read the problem statement itself:
- Given a bunch of functions of the form f(x) = |x — x_i| + t_i and if we define a new function g(x) as being the max across all the functions at x, we want to find the x value that minimizes g(x).
Submissions:
https://codeforces.me/contest/1730/submission/292825262 (binary searching on the position since the time function is convex) https://codeforces.me/contest/1730/submission/292826727 (binary searching on the time since it is monotonic)
Scroll to the bottom for the actual code. Thanks in advance.
Auto comment: topic has been updated by ycperson (previous revision, new revision, compare).
Try
printf("%.9lf", ans)orstd::cout << std::setprecision(9) << ans?I tried it right now and it gets to testcase 14 and has a similar issue...
I also then tried using long double instead but no luck.
Put
std::setprecision(9)beforepossible(x, t, (l+r)/2.0).second.Yeah that worked! Thanks. I have used setprecision before but did not realize there is a difference between its placement in the printing statement.
One usually puts it immediately after sync_with_stdio(0) unless you are changing the precision for different parts of the output.