Search found 120 matches

by v6ph1
Sat Feb 27, 2021 9:03 pm
Forum: News, Suggestions, and FAQ
Topic: Errors/Warnings/Bugs
Replies: 624
Views: 208635

Re: Errors/Warnings/Bugs

thanks - works for me now.
by v6ph1
Sat Feb 27, 2021 7:39 pm
Forum: News, Suggestions, and FAQ
Topic: Errors/Warnings/Bugs
Replies: 624
Views: 208635

Re: Errors/Warnings/Bugs

I solved the latest problem 749. After I typed in my solution, they showed me, I was 70th. But I can not enter the solution thread (no access) and neither the problem description nor my progress showed my that I've solved the problem. EDIT: The last entry in the fastest solver table is 40 minutes ag...
by v6ph1
Thu Feb 18, 2021 9:28 pm
Forum: News, Suggestions, and FAQ
Topic: Number of solvers for the latest 160 problems
Replies: 16
Views: 1202

Re: Number of solvers for the latest 160 problems

You should consider time as one reason: I started around 14 years ago - at this time there were only around 140 problems available. During this time, I reached at best place 9 within my country and was within the best 200 solvers in the world. My progress was around 70%. But times change: I had time...
by v6ph1
Sat Oct 10, 2020 7:20 pm
Forum: News, Suggestions, and FAQ
Topic: Meetup of all hard-core users who solved above X number of problems?
Replies: 4
Views: 1195

Re: Meetup of all hard-core users who solved above X number of problems?

Meetings are not a clever idea this year. Two countries have not published any cases - Turkmenistan and North Korea. And according to the statistics, meetings there would be save as there are only one (North Korea) respectively two (Turkmenistan) members with more than 100 problems solved. Otherwise...
by v6ph1
Sat Apr 25, 2020 7:14 pm
Forum: News, Suggestions, and FAQ
Topic: Tips for someone trying to get top 50?
Replies: 3
Views: 1975

Re: Tips for someone trying to get top 50?

In general: 1. Find a specialization. 1a. Train this part. 2. Read the problem max. 1s after the publishing 3. Code fast to solve it within the top 50. To be serious: 65 problems with a maximum difficulty of 20% is not so much. You just need time to get better an better. Read the solutions in the so...
by v6ph1
Wed Apr 22, 2020 6:33 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 155
Replies: 17
Views: 9841

Re: Problem 155

50 is missing:
r(60,60) = 30
r(60,60,60) = 20
p(r(60,60),r(60,60,60)) = 50
by v6ph1
Wed Apr 01, 2020 9:13 am
Forum: Clarifications on Project Euler Problems
Topic: Problem 679
Replies: 2
Views: 1569

Re: Problem 679

Have you checked overlapping occurances?
"arearea"
by v6ph1
Fri Jan 03, 2020 6:38 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 695
Replies: 2
Views: 1584

Re: Problem 695

The Unit-Square is the black one.
For clarification the three points should be chosen that the rectangles combine to a clear non-square rectangle.
by v6ph1
Mon Oct 21, 2019 11:00 pm
Forum: News, Suggestions, and FAQ
Topic: Errors/Warnings/Bugs
Replies: 624
Views: 208635

Re: Errors/Warnings/Bugs

Thanks - for me, it's working again. :D
by v6ph1
Mon Oct 21, 2019 9:58 pm
Forum: News, Suggestions, and FAQ
Topic: Errors/Warnings/Bugs
Replies: 624
Views: 208635

Re: Errors/Warnings/Bugs

by v6ph1
Thu Aug 15, 2019 8:35 pm
Forum: Recreational
Topic: Mystery of Problem 480.
Replies: 2
Views: 3054

Re: Mystery of Problem 480.

Statistics: There are ~5*10^17 possible words in it. And a lot of them are readable. Now calculate all of their Numbers. Build sums of three of them: You should find a sum which appears multiple times. (see Goldbach's conjecture) It is guaranteed if there are at least 1.5*10^6 readable words. And th...
by v6ph1
Sun Jun 30, 2019 9:28 pm
Forum: Number Theory
Topic: Generate tuples of pairwise coprimes with limit on largest element
Replies: 2
Views: 5820

Re: Generate tuples of pairwise coprimes with limit on largest element

You may work with a check-list for the primes:
1. Generate a list of all primes up to the limit
2. generate the first number by selecting primes (and powers) and cancel them out
3. go on for the 2nd, 3rd, ... number.
by v6ph1
Mon May 20, 2019 10:34 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 662
Replies: 6
Views: 5454

Re: Problem 662

For a smaller example 2x2: You can go: 0,0 - 0,1 - 0,2 - 1,2 - 2,2 0,0 - 0,1 - 1,1 - 2,1 - 2,2 0,0 - 0,1 - 1,1 - 1,2 - 2,2 0,0 - 1,0 - 1,1 - 2,1 - 2,2 0,0 - 1,0 - 1,1 - 1,2 - 2,2 0,0 - 1,0 - 2,0 - 2,1 - 2,2 --> 6 solutions only with step = 1 AND: (Two 1-steps and one 2-step) 0,0 - 0,1 - 0,2 - 2,2 0,...
by v6ph1
Sat Jan 12, 2019 12:06 am
Forum: Recreational
Topic: Some problem and user statistics
Replies: 6
Views: 8897

Re: Some problem and user statistics

What about the number of the best placements per person (ordered like in the olympic games)? 1. xyz (50 times 1st) 2. abc (26 times 1st) ... 19. dfg (40 times 2nd) ... Many of these statistics are interesting - but they are only as half as interesting, if you can not find your self in it. :wink: And...
by v6ph1
Wed Jan 02, 2019 11:28 pm
Forum: News, Suggestions, and FAQ
Topic: Code optimization techniques
Replies: 20
Views: 9250

Re: Code optimization techniques

I just changed your output so for each return, the current n is reported: -> the return is called twice as it's called by different function calls. For example fib(2) (the 4th call of fib) is startet, but it is still in progress until the result of fib(0) is returned. lookup[] = [-1, -1, -1, -1, -1,...
by v6ph1
Wed Jan 02, 2019 12:48 am
Forum: News, Suggestions, and FAQ
Topic: Code optimization techniques
Replies: 20
Views: 9250

Re: Code optimization techniques

It's only the return section of the previously called functions: The first calls of fib(5), fib(4), fib(3) and fib(2) did not immediately return - they need to call fib(n-1) and fib(n-2) first. So read it as follows: Stack: fib(5) (A.1) Call fib(5) -> nothing known; call fib(4) and fib(3) Stack: A T...
by v6ph1
Fri Dec 14, 2018 11:14 pm
Forum: Discrete Mathematics
Topic: Sorting...
Replies: 4
Views: 8674

Re: Sorting...

There is the problem of the handling of entries with equal values. So your "ArraySort" is not an algorithm for sorting, but for the mathematical union-sort operation. The algorithm of Array.sort() is not specified by the language it self: It can differ by the implementation - for primitive...
by v6ph1
Wed Sep 12, 2018 6:10 am
Forum: News, Suggestions, and FAQ
Topic: New Language
Replies: 2
Views: 3599

Re: New Language

by v6ph1
Thu Aug 23, 2018 9:03 pm
Forum: Programming languages
Topic: which compiler to use for c++ programs
Replies: 2
Views: 7034

Re: which compiler to use for c++ programs

You should clarify it: Do you mean websites?

Most of us use an installed compiler:
gcc, visual studio c++, intel or llvm
by v6ph1
Tue Aug 21, 2018 10:20 pm
Forum: Clarifications on Project Euler Problems
Topic: Problem 113
Replies: 1
Views: 1527

Re: Problem 113

Yes - bouncing is stated clearly as neither increasing nor decreasing.