SUMITR - Sums in a Triangle

Let us consider a triangle of numbers in which a number appears in the first line, two numbers appear in the second line etc. Develop a program which will compute the largest of the sums of numbers that appear on the paths starting from the top towards the base, so that:

  • on each path the next number is located on the row below, more precisely either directly below or below and one place to the right;
  • the number of rows is strictly positive, but less than 100;
  • all numbers are positive integers between O and 99.

Take care about your fingers, do not use more than 256 bytes of code.


In the first line integer n - the number of test cases (equal to about 1000). Then n test cases follow. Each test case starts with the number of lines which is followed by their content.


For each test case write the determined value in a separate line.


2 1
1 2 3
1 2 
4 1 2
2 3 1 1 

Warning: large Input/Output data, be careful with certain languages

hide comments
Fz: 2015-03-12 10:09:23

what is their aim to set code size limit to 256B?
such a small size..
people end up in writing everything in the same line, is that they want? or there is really something else behind this ?
please explain this

Mitch Schwartz: 2013-06-19 05:55:07

@Aniket Kumar: Try saving your C solution to a file; make sure there are no '\r' characters if you are on Windows; and use the "Browse..." button rather than copying and pasting into the edit box.

As for Python timing, I suppose Piotr Kąkol made his own test data as he didn't have access to Łukasz Kuszner's data, making the timings somewhat different.

Edit: Or, reading the comments, I think Piotr probably made his test data easier intentionally with respect to the time limit to encourage shorter solutions in slower languages.

Last edit: 2013-06-19 05:57:18
Aniket Kumar: 2013-06-18 17:46:59

the same C code is giving 255 bytes in TRI_SUMS (challenge) but here it says too long solution ...
Similary the python code ID:9505617 runs in 0.16 sec on TRI_SUMS bt here I get TLE...
Somebody please explain to me !!!

Last edit: 2013-06-18 17:49:41
Dominique VAILLANT: 2013-03-10 18:08:18

After removing more bytes my code is no more rejected.
I suppose SPOJ editor adds CR to LF...
(edit) You can try "choose a file" instead "insert code" : a difference is possible.
(edit) Thanks for the suggestion.

Last edit: 2013-03-11 02:19:13
Dominique VAILLANT: 2013-03-10 17:42:37

My code is within the limit but I get an
error message:
'Your solution is too long for this problem, the limit is 256 bytes!'
Issuing: wc -c sumitr.rb
I get: 253 sumitr.rb

Piotr KÄ…kol: 2011-01-21 17:01:30

@spoofer - There are different tests.

BTW, in TRI_SUMS the record is now 89 chars in Perl (in Ruby it's now 90).

Edit: Jander has beaten the record to 88 chars.

Last edit: 2011-05-12 15:53:33
Piotr KÄ…kol: 2010-07-24 17:31:15

The same task without limit:
But the shorter is Your code, the more points You get.
For now the record is 92 characters in Ruby.

Last edit: 2010-07-24 17:31:58
numerix: 2009-06-04 13:21:24

If you submit a solution using copy&paste each EOL seems to be counted as 2 bytes. If you submit it as file that problem doesn't occur.

Added by:kuszi
Time limit:2s
Source limit:256B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: NODEJS PERL6 VB.NET
Resource:6-th International Olympiad In Informatics July 3-10. 1994. Stockholm - Sweden, Problem 1