## Search found 11 matches

Mon Nov 23, 2015 4:47 am
Forum: Volume 113 (11300-11399)
Topic: 11395 - Sigma Function
Replies: 0
Views: 1113

### Re: 11395 - Sigma Function

can someone give a hint/algo/mathematical fact that can help in solving this problem?
Mon Nov 23, 2015 2:54 am
Forum: Volume 6 (600-699)
Topic: 619 - Numerically Speaking
Replies: 10
Views: 4910

### Re: 619 - Numerically Speaking

why am i getting RE? I tried udebug with both upper and lower bound inputs and my code works..

Code: Select all

``````got AC, code deleted
``````
EDIT: I got multiple REs just because the name of the main class isn't "Main"!!
Wed Jul 08, 2015 10:58 am
Forum: Algorithms
Topic: Sum Of Number of Divisors
Replies: 2
Views: 3824

### Re: Sum Of Number of Divisors

You seem to have misunderstood. Your code seems to calculate the sum of divisors of a number. That's not what I meant. In short, what I want is the summation of the number of divisors of numbers 1 to n. These are sample values: 1 - 1 (1 has only 1 divisor) 2 - 3 (2 has 2 divisors, so 1 + 2 = 3 ) 3 -...
Fri May 22, 2015 3:52 pm
Forum: Algorithms
Topic: Sum Of Number of Divisors
Replies: 2
Views: 3824

### Sum Of Number of Divisors

Can anyone tell me how the code below works? I mean what's the theory behind it. Or does it really work? I tried it for some values and it gave the right answers. It's supposed to return the sum of number of divisors of numbers from 1 to N. If you have better approach than this then please let me kn...
Sun May 17, 2015 11:56 pm
Forum: Volume 115 (11500-11599)
Topic: 11517 - Exact Change
Replies: 33
Views: 10294

### Re: 11517 - Exact Change

This is not the usual coin change problem where the number of each coin/bill is unlimited. The number of each coin/bill is the number of times it appears in the input. You are allowed to use the bills/coins as many times as they appear in the input. In the input you've given, there's only one 5 so y...
Fri May 15, 2015 2:39 pm
Forum: Volume 6 (600-699)
Topic: 673 - Parentheses Balance
Replies: 243
Views: 46852

### Re: 673 - Parentheses Balance

Input: 1 ((() Output: No Your code outputs "Yes". After you process the whole string. Check if the stack is empty or not. If it's not empty then it's a "No". Btw, couple of suggestions: 1-If you post your code, use the "Code" button at the top of the editor window. Your code may become more readable...
Thu May 14, 2015 1:30 pm
Forum: Volume 100 (10000-10099)
Topic: 10069 - Distinct Subsequences
Replies: 26
Views: 13374

### Re: 10069 - Distinct Subsequences

...which I also can't find. (along with delete). So I'm not the only experiencing this problem. Anyway, how come it's about big integer? I thought that "Z nor any prefix or suffix of Z will have more than 10100 distinct occurrences in X as a subsequence." That was also my question. But when I looke...
Thu May 14, 2015 2:07 am
Forum: Volume 105 (10500-10599)
Topic: 10533 - Digit Primes
Replies: 108
Views: 32234

### Re: 10533 - Digit Primes

Make an array(let's say "arr") that stores the number of digit primes up to the value of the index. For example, arr[10] contains the number of digit primes from 0 to 10. Fill this array before processing any input. Check if 0 is digit prime. It isn't. So arr[0] is 0. Next is 1. It isn't either so a...
Mon May 04, 2015 9:18 am
Forum: Volume 100 (10000-10099)
Topic: 10069 - Distinct Subsequences
Replies: 26
Views: 13374

### Re: 10069 - Distinct Subsequences

How can I edit my post? I checked the FAQ and it said that there's a button for editing posts but I can't find it. I want to edit my code above.
I found a bug but it still gets RTE. I want to fix that bug (even though the program still doesn't work, it's still one less bug), but I can't
edit my post.
Mon May 04, 2015 8:12 am
Forum: Volume 104 (10400-10499)
Topic: 10469 - To Carry or not to Carry
Replies: 24
Views: 10599

### Re: 10469 - To Carry or not to Carry

If you've read the early posts, you've already found out that the solution is simpler than what your code seems to do. The problem states that He was doing bitwise addition but his carry bit always had zero output. Now how do you do bitwise addition? 0 + 0 = 0 0 + 1 = 1 1 + 0 = 1 1 + 1 = 0 carry 1 T...
Mon May 04, 2015 7:14 am
Forum: Volume 100 (10000-10099)
Topic: 10069 - Distinct Subsequences
Replies: 26
Views: 13374

### Re: 10069 - Distinct Subsequences

RTE for a few times in a row now. I've tried the inputs in this thread and other inputs using udebug.com and my program got the right results and didn't crash. Please provide more tricky I/Os. If you can help in finding the bug, here's my code:

Code: Select all

``````Code deleted after AC
``````